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:
Human females have ____ X chromosomes.\Question: Choose the right answer from options given a) two b) six c) one d) eight

Ex Output:
a


Ex Input:
Cleavage is perfect in ____ directions, prismatic.\Question: Choose the right answer from options given a) two b) nine c) three d) seven

Ex Output:
a


Ex Input:
Plants grow through precisely spaced and sized holes in top and each of the ____ sides.\Question: Choose the right answer from options given a) no b) nine c) one d) four

Ex Output:

d