HDFC Life Insurance Co.'s standalone net profit rose 15.8% year-on-year in the January–March quarter to Rs 477 crore.The net premium income during the quarter climbed 16% year-on-year to Rs 23,766 crore.HDFC Life's solvency ratio increased to 194% compared to 187% in the year-ago quarter.Shares of HDFC Life closed 0.57% higher at Rs 720.1 on the BSE.