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').

[EX Q]: All loci have ____ or two alleles.\Question: Choose the right answer from options given a) no b) six c) four d) one
[EX A]: d

[EX Q]: Anthrax usually is a fatal disease with ____ symptoms observed.\Question: Choose the right answer from options given a) no b) seven c) one d) six
[EX A]: a

[EX Q]: Red algae are haplo-diplonts with a complicated life cycle that often involves ____ phases.\Question: Choose the right answer from options given a) three b) no c) six d) seven
[EX A]:
a