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').

[Q]: Sexual reproduction involves ____ individual organisms.\Question: Choose the right answer from options given a) six b) no c) two d) nine
[A]: c


[Q]: Aspiration pneumonia includes ____ syndromes based on the nature of the inoculum.\Question: Choose the right answer from options given a) three b) seven c) eight d) no
[A]: a


[Q]: Erbium is obtained by separating yttria, found in the mineral gadolinite, into ____ parts.\Question: Choose the right answer from options given a) one b) three c) five d) six
[A]:
b