Number Series - Verbal and Reasoning

Directions to SolveLook carefully for the pattern, and then choose which pair of numbers comes next.
Q1:

Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?

A A16

B G4

C E4

D E3

ANS:C - E4

The letters decrease by 1; the numbers are multiplied by 2.