21. In a petition for a writ of habeas corpus concerning a minor child, the Court, in a given case, may direct to change the custody of the child or decline the same keeping in view the attending facts and circumstances. For the said purpose it would be required to examine whether the custody of the minor with the private respondent, who is named in the petition, is lawful or unlawful. In the present case, the private respondent is none other than the biological mother of the minor child. This being the fact, it may be presumed that the custody of the child with his mother is not unlawful. It would only be in an exceptional situation that the custody of a minor may be directed to be taken away from the mother for being given to any other person-including father of the child, in exercise of writ jurisdiction. This would be so also for the reason that the other parent, in the present case, the father, can take resort to the substantive statutory remedy in respect of his claim regarding custody of the child.