BENGALURU (Reuters) - Indian shares stepped back on Friday after four straight sessions of gains that set them on course for their strongest week since early-February, with earnings of Reliance Industries, the country’s most valuable company, in focus. The NSE Nifty 50 index fell 0.78% to 14,778.9 by 0349 GMT, while the benchmark S&P BSE Sensex slipped 0.84% to 49,345.57. Both the indexes are likely to close the week around 3% higher on gains from upbeat earnings reports. Reliance was marginally lower ahead of its quarterly results. The stock is up more than 6% this week, as of its last close. Wipro climbed as much as 4% to a record high after the IT firm raised its outlook for June-quarter IT services revenue following the close of an acquisition. Benchmark Nifty 50 component IndusInd Bank is also due to report earnings later in the day.