The fuel is after 4th lap is 22 and it is 18 after 7 laps then how many laps are made at the end:...? Mcqs

The fuel is after 4th lap is 22 and it is 18 after 7 laps then how many laps are made at the end:...?

(A) 10

(B) 12

(C) 14

(D) 16