Seven people, A, B, C, T, U, V and W are sitting in a row, facing north. Only two people sit to the right of C. Only two people sit between C and U. Only two people sit between A and V. V sits to the immediate left of C. T sits to the immediate right of W. Who sits at third position from the left end of the line?

The correct option is B.

Let us determine the seating arrangement step-by-step for the 7 people (sitting from left to right, facing North):

Step 1: Locate C and V
"Only two people sit to the right of C." This places C at the 5th position from the left.
"V sits to the immediate left of C." This places V at the 4th position.

Step 2: Locate U
"Only two people sit between C and U." Counting two spots to the left of C (positions 4 and 3), U sits at the 2nd position.

Step 3: Locate A
"Only two people sit between A and V." Since V is at the 4th position, placing two people between A and V to the left (positions 3 and 2) puts A at the 1st position.

Step 4: Locate W and T
"T sits to the immediate right of W." The only adjacent empty spots left are at positions 6 and 7. Therefore, W sits at the 6th position and T sits at the 7th position.

Step 5: Place the remaining person
The only empty spot left is at the 3rd position, which must be occupied by B.

Final Seating Order (Left to Right):
Position 1: A
Position 2: U
Position 3: B
Position 4: V
Position 5: C
Position 6: W
Position 7: T

Thus, B sits at the third position from the left end of the line.