Q26

MCQ1 mark, −0.25

The number of different $n \times n$ symmetric matrices with each element being either 0 or 1 is: (Note: $\text{power} \left(2, X\right)$ is same as $2^X$ )

(A)

$\text{power} \left(2, n\right)$

(B)

$\text{power} \left(2, n^2\right)$

(C)

$\text{power} \left(2,\frac{ \left(n^2+ n \right) }{2}\right)$

(D)

$\text{power} \left(2, \frac{\left(n^2 - n\right)}{2}\right)$

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