Correct Answer - A::B
In elastic collision, velocities are interchanged. So, `v` is minimum
`:. 1/2xx0.1xxv^2=0.2`
`:. V=2m//s=`minimum value
In perfectly inelastic collision, speed of combined mass will remain half.
`:. 1/2xx0.1xx(v/2)^2=0.2`
`:. v=2sqrt2m//s`=maximum value