What is the next letter in the series: B, E, H, K, ?

A. N

Find the missing letter in the series: M, O, Q, S, ?

A. T

Identify the missing letter in the series: a, b, d, e, ?

A. F

What is the missing number in the series: 12, 24, 48, 96, ?, 384

A. 192

Find the odd one out in the series: A, C, E, G, H, I, K

C. H