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: Quarks also come in ____ 'colours', terms for a property a little like electrical charge.\Question: Choose the right answer from options given a) three b) nine c) six d) no

Answer: a


Question: Trains kill ____ people every year.\Question: Choose the right answer from options given a) zero b) three c) no d) four

Answer: d


Question: All limbs have ____ digits.\Question: Choose the right answer from options given a) three b) seven c) five d) ten

Answer:
c