Find the next term of the given Alphanumeric series :

4 CV, 9 FU, 20 IT, 43 LS, __?

90 OR

4CV, 9FU, 20 IT, 43 LS

C is at 3, F is at 6, I is at 9, L is at 12 thus next is 15 that is O

V is at 22, U at 21, T at 20 S at 19 thus next is at 18 that is R

4 × 2 + 1 = 9

9 × 2 + 2 = 20

20 × 2 + 3 = 43

43 × 2 + 4 = 90

The correct answer is Option (2) → 90 OR