Sitting without support is appear at which month

Sitting without support is appear at
which month
a) 5 month
b) 6 month
c) 7 month
d) 8 month
Correct Answer - B
Ans. is ‘b’ i.e., 6 month
3 month Neck holding
5 month Roll over
6 month Sits in tripod position
8 month Sitting without support
9 month Stand with support