Seven persons A, B, C, D, E, F and G sit in a row facing north. They have different elements named copper, nickel, gold, mercury, aluminum, silver and iron. The information is not used in the same order as given. The one who have gold sits third to the left of D, none of them sits at any of the extreme ends. E sits immediate right of the one who have gold. B and E sit adjacent to each other. The one who have iron sits second to the left of B. Two persons sit between G and F. The one who has mercury sits fourth to the right of G. The one who have copper sits immediate right of the one who has silver. The one who have nickel sits to the left of F and to the right of A.

What is the position of G with respect to A?

To find the position of G with respect to A, we can determine the step-by-step arrangement of the seven persons A, B, C, D, E, F, and G sitting in a row facing north (numbered 1 to 7 from left to right) along with their corresponding elements.

Step 1: Analyze the position of D and the person who has gold
According to the clues:

• The person with gold sits third to the left of D.
• Neither the person with gold nor D sits at the extreme ends (positions 1 and 7).

Let the position of the person with gold be $x$. Then D sits at position $x+3$.
Since $x>1$ and $x+3<7$, the possible values for $x$ are:
Case A: Gold at position 2, D at position 5.
Case B: Gold at position 3, D at position 6.

Step 2: Position E, B, and the one with iron
We are given:

• E sits immediate right of the one who has gold.
• B and E sit adjacent to each other.
• The one who has iron sits second to the left of B.

Let us test the two cases:
Case A: Gold is at 2, D is at 5.
Then E is at 3 (immediate right of 2). Since B is adjacent to E (at 3), B can be at 2 or 4.

• If B is at 2: The person second to the left of B (position 0) must have iron, which is impossible.
• If B is at 4: The person second to the left of B (position 2) must have iron. But position 2 is already occupied by the person with gold, so it cannot have iron.

Thus, Case A is invalid.

Case B: Gold is at 3, D is at 6.
Then E is at 4 (immediate right of 3). Since B is adjacent to E (at 4), B can be at 3 or 5.

• If B is at 5: The person second to the left of B (position 3) must have iron. But position 3 has gold, so this is impossible.
• If B is at 3: The person second to the left of B (position 1) has iron. This is a valid configuration.

Therefore, B has gold at position 3, E is at position 4, D is at position 6, and the person at position 1 has iron.

Step 3: Position G, F, and the one with mercury
We are given:

• Two persons sit between G and F.
• The one who has mercury sits fourth to the right of G.

The remaining unoccupied positions for G and F (keeping 2 empty spaces between them) can only be positions 2 and 5.
If G is at 5, the person with mercury would sit at position 5 + 4 = 9, which is out of bounds.
Therefore, G is at position 2 and F is at position 5.
The person with mercury sits at position 2 + 4 = 6, which is D.

Step 4: Position the remaining elements and persons
Currently, our arrangement is:

• Position 1: [Person A/C], Iron
• Position 2: G, [Element]
• Position 3: B, Gold
• Position 4: E, [Element]
• Position 5: F, [Element]
• Position 6: D, Mercury
• Position 7: [Person C/A], [Element]

We are given:

• The one who has copper sits immediate right of the one who has silver. This means silver and copper must be in adjacent positions. The only adjacent empty element positions left are 4 and 5. Thus, E at position 4 has silver, and F at position 5 has copper.
• The one who has nickel sits to the left of F (position 5) and to the right of A.

Since the remaining elements are nickel and aluminum, and nickel must be to the left of position 5, G at position 2 must have nickel. This leaves aluminum for the person at position 7.
Since G (position 2, with nickel) sits to the right of A, A must be at position 1. This leaves C to occupy position 7.

Final Seating Arrangement:
1. A (Iron)
2. G (Nickel)
3. B (Gold)
4. E (Silver)
5. F (Copper)
6. D (Mercury)
7. C (Aluminum)

Comparing the positions of A (position 1) and G (position 2), G sits Immediate right of A.