In the sequence 5, 10, 20, 40, what is the next number?

C. 80

Choose the odd letter group: A, B, C, D, E

D. E

From the input 'zebra monkey apple', what will be the output after rearranging the words in reverse alphabetical order?

A. ZEBRA MONKEY APPLE

Select the odd pair of words.

A. PIANO - MUSIC

Choose the odd letter group: M, N, O, P, Q

D. Q