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').

Example Input: Females inherit ____ X chromosomes, one from each parent.\Question: Choose the right answer from options given a) five b) two c) no d) seven
Example Output: b

Example Input: Stroke is the number ____ cause of death in the United States.\Question: Choose the right answer from options given a) ten b) nine c) one d) three
Example Output: d

Example Input: Most citrus trees consist of ____ distinct parts.\Question: Choose the right answer from options given a) four b) seven c) five d) two
Example Output:
d