Statement 1) m=-n or m+n =0
Take m=5 and n=-5; then m-n= 10
Take m=-5 and n=5; then m-n=-10......Insufficient
Statement 2) |m|= -|n| or |m|+|n|=0; Only possible if m=n=0. Then m-n=0........Sufficient.
Answer is B
Take m=5 and n=-5; then m-n= 10
Take m=-5 and n=5; then m-n=-10......Insufficient
Statement 2) |m|= -|n| or |m|+|n|=0; Only possible if m=n=0. Then m-n=0........Sufficient.
Answer is B
