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Given structures are lying in vertical p...

Given structures are lying in vertical plane and are hinged at x. Every structure is made up of two identical rods with mass M & length L each. Initially all are at rest and released. Initially in every case, one of the rods of the structure is vertical and the other horizontal

A

`{:(P,Q,R,S),(2,3,4,1):}`

B

`{:(P,Q,R,S),(1,4,2,3):}`

C

`{:(P,Q,R,S),(3,2,4,1):}`

D

`{:(P,Q,R,S),(2,3,1,2):}`

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