TASK DEFINITION: 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').
PROBLEM: Obesity is, in general, the result of personal choices and poses ____ risk of communication.\Question: Choose the right answer from options given a) four b) six c) zero d) seven

SOLUTION: c

PROBLEM: Poisons come in ____ different forms .\Question: Choose the right answer from options given a) four b) no c) five d) ten

SOLUTION: a

PROBLEM: Japan is a highly urbanised country, with approximately ____ in every four people living in cities.\Question: Choose the right answer from options given a) ten b) no c) five d) three

SOLUTION:
d