Answer:
Option B,D
Explanation:
We can apply L=m(r × v) for different parts
For example
if part (a) , cooredinates of A are (R√2,R√2)
there fore ,r = R√2ˆi+R√2ˆj and v=vˆi
So, subsuituting in L=m(r× v) we get,
L=−mvR√2ˆR
Hence, option (a) is correct, similarly , we can check other options also