$\displaystyle \\\textup{ If } A_i=1,2,3,4..9 \textup{ are perfect odd squares }\\$

$\displaystyle T=\begin{vmatrix}

A_1& A_2 &A_3\\

A_4 & A_5 &A_6\\

A_7&A_8&A_9

\end{vmatrix}\\$

$\displaystyle \textup{then T is always a multiple of-}\\$

$\displaystyle \textup{options are }-\\\textup{a)4 b)7 c)16 d)5}$