If $n$ is a positive integer such that $8n + 1$ is a perfect square, then (A) $n$ must be odd (B) $n$ cannot be a perfect square (C) $2n$ cannot be a perfect square (D) none of the above
If $n$ is a positive integer such that $8n + 1$ is a perfect square, then\\
(A) $n$ must be odd\\
(B) $n$ cannot be a perfect square\\
(C) $2n$ cannot be a perfect square\\
(D) none of the above