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:
Carbon forms ____ bonds.\Question: Choose the right answer from options given a) five b) four c) two d) three
answer:
b


question:
National forests have regulations that restrict ____ wheeler use to established roads.\Question: Choose the right answer from options given a) no b) four c) six d) nine
answer:
b


question:
Natural selenium contains ____ stable isotopes.\Question: Choose the right answer from options given a) five b) nine c) eight d) six
answer:

d