Four point masses, each of value \( \mathrm{m} \), are placed at the corners of a square ABCD of...

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Four point masses, each of value \( \mathrm{m} \), are placed at the corners of a square ABCD of side \( \ell \). The moment of inertia of this system about an axis passing through \( \mathrm{A} \) and parallel to \( \mathrm{BD} \) is -
\( P \)
(A) \( 3 \mathrm{~m} \ell^{2} \)
(B) \( m \ell^{2} \)
(C) \( 2 \mathrm{~m} \ell^{2} \)
(D) \( \sqrt{3} \mathrm{~m} \ell^{2} \)
[AIEEE 2006]
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