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: Conglomerate integration is when ____ apparently unconnected companies merge.\Question: Choose the right answer from options given a) two b) six c) no d) three
Example Output: a

Example Input: Electrons have almost ____ mass and are negatively charged.\Question: Choose the right answer from options given a) three b) seven c) zero d) no
Example Output: d

Example Input: Mitosis is cell division which results in ____ identical cells.\Question: Choose the right answer from options given a) six b) two c) nine d) no
Example Output:
b