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').

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

Nematodes occur in ____ general forms.\Question: Choose the right answer from options given a) nine b) two c) seven d) ten
b

China is home to one out of every ____ people on earth.\Question: Choose the right answer from options given a) five b) two c) nine d) four

a