GA Q5

MCQ1 mark, −0.33

Let $p_1$ and $p_2$ denote two arbitrary prime numbers. Which one of the following statemetns is correct for all values of $p_1$ and $p_2$ ?

(A)

$p_1 +p_2$ not a prime number

(B)

$p_1p_2$ is not a prime number

(C)

$p_1+p_2+1$ is a prime number

(D)

$p_1p_2+1$ is a prime number

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