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: Heme is made of ____ pyrrole groups united to form a porphyrin ring.\Question: Choose the right answer from options given a) five b) four c) eight d) six

Answer: b


Question: Righteousness always points in ____ directions.\Question: Choose the right answer from options given a) six b) two c) one d) four

Answer: b


Question: Atoms gain or lose electrons to get ____ electrons in their outer shell .\Question: Choose the right answer from options given a) eight b) nine c) seven d) four

Answer:
a


