Some kids stand in the form of a circle. For every kid, both his(or her) neighbors are not of same gender. That is, one neighbor of every kid is a boy and the other is a girl. Which of the following are correct (multiple answers could be correct!):

1. There must be even number of kids.

2. The number of kids is divisible by 4.

3. Either there might be even number of boys or even number of girls, but both need not be even.

4. Both, the number of boys and the number of girls is even.

Do **substantiate** your answer.