Correct Answer - c
` vec(OA) = vec(p_(1)) =` initial momentum of player northward
`vec(OB) = vec(p_(2)) =` final momentum of player westward
According to triangle law of vectors `vec(AB) + vec(AB) =vec(OB)`
`vec(AB) = vec(OB) - vec(OA) = vec(p_(2)) -vec(p_(1))` = change in momentum
The change in momentum of player is along south west
As motion is due to frictional force of reaction of the ground , therefore that acts on the player is frictional force along south west
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