individual demand function

[ranjankumarnayak5]

The condition when the individual demand function can be aggregated to generate the
aggregate demand function
A. substitution effect = 0
B. total eflect is zero
C. Income effect:0
D. always can aggregate the individual demand function

[ranjankumarnayak5]

some one please clear my doubt. thank you.

[ranjankumarnayak5]

friends please help me.

[ranjankumarnayak5]

is the answer d

[Dr. Strange]

Yes its d

[ranjankumarnayak5]

Thanks a lot Sir!