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:
Plants have three and ____ way branching carying sixteen buds.\Question: Choose the right answer from options given a) seven b) six c) four d) ten

Ex Output:
c


Ex Input:
Tetrapods are animals that have ____ legs or leg-like appendages.\Question: Choose the right answer from options given a) four b) one c) ten d) six

Ex Output:
a


Ex Input:
Raptors usually have ____ talons pointing forward and one talon pointing backward.\Question: Choose the right answer from options given a) four b) no c) three d) eight

Ex Output:

c