Which of the following is not a ground for judicial separation of a marriage:

Under Section 10(1) of the Hindu Marriage Act, 1955, a petition for judicial separation may be presented on any of the grounds specified in Section 13(1), and by a wife also on any of the grounds specified in Section 13(2). Cruelty (Section 13(1)(ia)), suffering from venereal disease in a communicable form (Section 13(1)(v)), and bigamy/having another wife living (Section 13(2)(i)) are statutory grounds, whereas a demand for dowry is not enumerated as an independent statutory ground (unless it is proved to amount to cruelty).