India’s benchmark indices sustained gains as banking, metal, and services stocks advanced. At 12:47 p.m., the Sensex traded with 0.17% gains at 61,521.29 on the BSE, while the Nifty 50 advanced 0.14% to 18,269 on the NSE. Among Nifty 50 constituents, 30 stocks advanced, 18 declined, and two remained unchanged.Apollo Hospitals Enterprise Ltd., Bajaj Finance Ltd., JSW Steel Ltd., HDFC Life Insurance Co. and State Bank of India were the…