Elitmus Exam Numerical Ability Number System

if a, a+2, a+4 are prime numbers ,then the number of possible solutions for a is-
a. 1 b.2 c. 3 d. more than 3

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Elitmus Other Question

election _____ by both the rival contestants (logA + logB +logC)/log6=6; find how many possible solution exist.