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 birds have ____ toes, three that face forward and one rearward.\Question: Choose the right answer from options given a) two b) ten c) nine d) four

Ex Output:
d


Ex Input:
French women are ____ times more likely to have accidents and commit suicides.\Question: Choose the right answer from options given a) no b) three c) one d) five

Ex Output:
d


Ex Input:
Humans have ____ different types of antibodies which are given shorthand names.\Question: Choose the right answer from options given a) seven b) two c) ten d) five

Ex Output:

d