Directions: Read the information carefully and answer the question.

Five participants A, B, C, D and E stand in a single line facing north. B occupies the extreme right position. E stands immediately to the left of B. C is immediately to the left of A. D and E are not standing next to each other.

Which participant stands at the extreme left of the line?

The correct option is D.

Step-by-step Explanation:

Let us determine the positions of the five participants (A, B, C, D, and E) in a single line facing north, numbered 1 to 5 from left to right:
[Position 1 (Extreme Left), Position 2, Position 3, Position 4, Position 5 (Extreme Right)]

Step 1: Place B and E based on fixed conditions.
- We are given that "B occupies the extreme right position."
Therefore, Position 5 = B.
- Next, "E stands immediately to the left of B."
Therefore, Position 4 = E.
Current arrangement: [ _ , _ , _ , E, B ]

Step 2: Apply the condition regarding D and E.
- We are told that "D and E are not standing next to each other."
Since E is at Position 4, D cannot be placed at Position 3 (which is adjacent to E).

Step 3: Place C and A.
- We know that "C is immediately to the left of A."
This means C and A must occupy two adjacent positions in the block [C, A].
The available consecutive empty spots are Positions 2 and 3.
Therefore, Position 2 = C and Position 3 = A.
Current arrangement: [ _ , C, A, E, B ]

Step 4: Determine the extreme left position.
- The only remaining position is Position 1 (Extreme Left), which must be occupied by participant D.
Final seating arrangement from left to right: D - C - A - E - B.

Thus, participant D stands at the extreme left of the line.