1) Find the next letter in the series ? A, B, D, H, _? A) L B) N C) R D) P Answer: Option DExplanation:Each letter in the given series is multiplied with 2 to get the next letter in the series. A x 2=1 x 2=2 B x 2=2 x 2=4 H x 2=8 x 2=16 16 th letter is P.