Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Ex Input:
Most viruses have only ____ organelles.\Question: Choose the right answer from options given a) ten b) two c) four d) eight

Ex Output:
b


Ex Input:
Turkey also has ____ inland drainage basins.\Question: Choose the right answer from options given a) zero b) two c) eight d) nine

Ex Output:
b


Ex Input:
Dwarves are bipeds and measure about ____ to five feet in height.\Question: Choose the right answer from options given a) ten b) seven c) six d) four

Ex Output:

d