Mahanagar Gas Ltd surged 4% at open after the government approved an incentive scheme to expand domestic piped natural gas connections. Sammaan Capital Ltd rose 3% after clarifying it is not an accused in the Supreme Court probe into its former promoter, easing regulatory concerns. HCL Technologies Ltd and Sun Pharmaceutical Industries Ltd were among the few Sensex winners, gaining 0.82% and 0.83% respectively as investors...