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').

Input: Consider Input: Sea stars have ____ arms, or rays, connected to a small round body.\Question: Choose the right answer from options given a) five b) six c) seven d) no

Output: a


Input: Consider Input: Bacteria come in ____ basic shapes.\Question: Choose the right answer from options given a) five b) one c) three d) nine

Output: c


Input: Consider Input: Cleavage is perfect in ____ directions forming rhombohedrons.\Question: Choose the right answer from options given a) no b) three c) four d) zero


Output: b