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').

[EX Q]: Gravity is the force that brings ____ objects together .\Question: Choose the right answer from options given a) five b) two c) one d) nine
[EX A]: b

[EX Q]: Trinity comes from tri-unity which means ____ in one.\Question: Choose the right answer from options given a) four b) three c) eight d) zero
[EX A]: b

[EX Q]: All Dishevelled proteins have ____ highly conserved domains.\Question: Choose the right answer from options given a) three b) eight c) ten d) one
[EX A]:
a