Correct option is A
Given:
Six students : B, D, F, U, V and X.
Logic:
i) X scored more marks than only two students.
__ > __ > __ > X > __ > __.
ii) B scored marks more than F but less than U.
U > B > F; , __ > __ > __ > X > __ > __.
iii) If F scored more marks than X.
U > B > F > X > V/D > D/V
Here, U scored the highest marks.
Thus, U is the correct answer.