Kotak Mahindra Bank Ltd on Saturday reported a 25.6 percent year-on-year rise in standalone net profit for the April-June quarter, beating Street estimates, while net interest income (NII) came in slightly below expectations. Asset quality also improved from a year ago. The private sector lender posted a standalone net profit of Rs 4,122.96 crore for the quarter ended June 30, compared with the CNBC-TV18 poll estimate of Rs 3,910 crore. Net profit stood at Rs 3,282 crore in the corresponding quarter last year.