Factorize : $25a^2-4b^2+28bc-49c^2$

Question

$\begin{array}{1 1} (5a+2b-7c)(5a-2b+7c) \\(5a-2b-7c)(5a-2b+7c) \\ (5a+2b+7c)(5a+2b+7c) \\ (5a+2b+7c)(5a-2b+7c) \end{array} $