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: Healthcare providers diagnose ____ general types of insomnia.\Question: Choose the right answer from options given a) two b) eight c) one d) three

Answer: a


Question: Most lemmings are three to ____ inches in length and weigh less than four ounces.\Question: Choose the right answer from options given a) four b) six c) one d) ten

Answer:
b