Correct option is B
Given:
· B6 is fifth to the right of B1
· B4 is fifth to the right of B5
· B5 is to the immediate right of B1
· B8 is third to the left of B4
· B2 is third to the right of B7
· B7 is an immediate neighbour of B1
From the given information following seating arrangement can be drawn-

B7 is sitting on the immediate left of B1.
Correct answer is (b) B7.