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Figure shows two identical particles 1 and 2 each of mass m moving in opposite direction with same speed v along parallel lines. At a particular instant $r_{1}$ and $r_{2}$ are their respective position vectors drawn from point A which is in the plane of the parallel lines. Choose the correct options
Given; $⊙$ represents a unit vector coming out of the page $\otimes$ represents a unit vector going into the Page.

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Angular momentum $L_{1}$ of particle 1 about A is $L_{1} = m v d_{1} ⊙$

Angular momentum $L_{2}$ of particle 2 about A is $L_{2} = m v r_{2} ⊙$

Total angular momentum of the system about A is $L = m v (r_{1} + r_{2}) ⊙$

Total angular momentum of the system about A is $L = m v (d_{2} - d_{1}) \otimes$

answer is A, D.

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