On which of the following grounds is a Hindu wife NOT entitled to live separately from her husband…

Section 18(2) of the Hindu Adoptions and Maintenance Act, 1956 lets a Hindu wife live separately without losing her claim to maintenance if, among other grounds, her husband is guilty of desertion, has treated her with cruelty, has any other wife living, keeps a concubine in the same house or habitually resides with one elsewhere, or has ceased to be a Hindu by conversion. A husband who "is not guilty of desertion" gives her no ground at all, so that is the situation that does NOT entitle her to live separately. Having another wife living, keeping a concubine, and ceasing to be a Hindu by conversion are all grounds listed in Section 18(2).