Uttar Pradesh Urban Buildings (Regulation of Letting, Rent and Eviction) Act (13 of 1972) , S.21(1)(a)— Eviction - Bona fide need - Concurrent findings that landlord's need for carrying business operation in suit house is bona fide, based on appreciation of evidence - Question whether tenancy is solely for residential purpose or for commercial purpose or for composite purpose is question of fact - Plea of maintainability of application under S. 21(1) (a) neither raised by tenant before prescribed authority nor before First Appellate Court - Such plea cannot be allowed to be raised for first time in writ appeal - Order of High Court interfering with concurrent findings entirely one new ground of maintainability of application under S. 21(1)(a), erroneous and set aside. Eviction - Bona fide need - Concurrent findings that landlord's need for carrying business operation in suit house is bona fide, based on appreciation of evidence - Question whether tenancy is solely for residential purpose or for commercial purpose or for composite purpose is question of fact - Plea of maintainability of application under S. 21(1) (a) neither raised by tenant before prescribed authority nor before First Appellate Court - Such plea cannot be allowed to be raised for first time in writ appeal - Order of High Court interfering with concurrent findings entirely one new ground of maintainability of applicat....