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: Human malaria is caused by ____ species of Plasmodium . .\Question: Choose the right answer from options given a) six b) ten c) seven d) four

Answer: d


Question: Birds have ____ eyes.\Question: Choose the right answer from options given a) eight b) five c) nine d) two

Answer: d


Question: Some sharks have ____ rows of teeth.\Question: Choose the right answer from options given a) eight b) five c) six d) nine

Answer:
b