Explanation:

Order 5 Rule 15 – 
ORDER V Issue and service of summons Issue of Summons
[15. Where service may be on an adult member of defendant's family.— Where in any suit the defendant is absent from his residence at the time when the service of summons is sought to be effected on his at his residence and there is no likelihood of his being found at the residence within a reasonable time and he has no agent empowered to accept service of the summons on his behalf, service may be made on any adult member of the family, whether male or female, who is residing with him. Explanation. —A servant is not a member of the family within the meaning of this rule.]