instruction:
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').
question:
Natural chlorine contains ____ isotopes.\Question: Choose the right answer from options given a) two b) six c) eight d) seven
answer:
a


question:
Righteousness always points in ____ directions.\Question: Choose the right answer from options given a) six b) two c) one d) four
answer:
b


question:
Some whales can remain submerged for up to ____ hours.\Question: Choose the right answer from options given a) seven b) nine c) eight d) two
answer:

d