Initially spring is compressed by `x_(0)` and blocks are in contact when system is released, then block starts moving and after some time contact between blocks, then
A. Blocks will be separated at natural length of spring.
B. After separation block A performs SHM os amplitude `x_(0)sqrt(m_(1)/(m_(1)+m_(2))`
C. After separation maximum velocity of block A is `x_(0)sqrt(k/(m_(1)+m_(2))`
D. After separation block A will perfom SHM of amplitude `x_(0)`