If a, a +2 and a + 4 are prime numbers then the number of possible solution for a is

three

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two

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one

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more than three

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Solution

The correct option is C one
The very first odd prime number is 3.If we take a=3 then $a + 2 = 3 + 2 = 5$
$a + 4 = 3 + 4 = 7$
These all are prime number
If a, a +2 and a + 4 are prime numbers then the number of possible solution for a is 1

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