Can only child be given in adoption

Yes

yes u can 

@ Author

No person except the father or mother or the guardian of a child shall have the capacity to give the child in adoption is thumb Rule.

1. Subject to the provisions of (sub Section (3) and sub-section (4), the father, if alive shall alone have the right to give in adoption, but such right shall not be exercised save with the consent of the mother unless the mother has completely and finally renounced the world or has ceased to be a Hindu or has been declared by a court of competent jurisdiction to be of unsound mind, has the capacity to take a son or daughter in adoption.

2. The mother may give the child in adoption if the father is dead or has completely and finally renounced the world or has ceased to be a Hindu or has been declared by a Court of competent jurisdiction to be of unsound mind.

3. With both the father and mother are dead or have completely and finally renounced the world or have abandoned the child or have been declared by a Court of competent jurisdiction to be of unsound mind or where the parentage of the child may give the child in adoption with the previous permission of the court any person including the guardian himself.

4. Before granting permission to a guardian under sub-section (4) the court shall be satisfied that the adoption will be for the welfare of the child, due consideration being for this purpose given to the wishes of the child having regard to the age and understanding of the child and that the applicant for permission has not received or agreed to receive and no person has made or given or agreed to make or give to the applicant any payment or reward in consideration of the adoption except such as the court may sanction.

Kindly read down HAMA, 1956