1. 

What should come in the place of question mark (?) in the following alpha numeric series?

Q1F, S2E, U6D, W24C, ?

A. Y120B
B. Y44B
C. Z88B
D. Y66B
E. None of these

Answer: Option A

Explanation:

Pattern of the series as shown below

letter-and-symbol-series-logical-reasoning-practice-level---letter-and symbol-series-problems

Hence, the missing term is IQ24.