Which of the following is not a ground for “divorce by mutual consent” under Hindu Marriage Act, 1955 ?

Section 13B(1) of the Hindu Marriage Act, 1955 requires a joint petition alleging that the parties "have been living separately for a period of one year or more", that "they have not been able to live together" and that "they have mutually agreed that the marriage should be dissolved".

Six months' separation is not a ground. Six months appears only in section 13B(2) as the period after presentation of the petition before the second motion may be made.