Mumbai, Sept. 15 -- GAIL (India) Ltd dropped for a fifth straight session today. The stock is quoting at Rs 170.89, down 1.57% on the day as on 13:19 IST on the NSE. The benchmark NIFTY is down around 0.44% on the day, quoting at 23294.15. The Sensex is at 74528.29, down 0.34%.GAIL (India) Ltd has lost around 0.7% in last one month.Meanwhile, Nifty Energy index of which GAIL (India) Ltd is a constituent, has eased around 3.12% in last one month and is currently quoting at 37935.2, down 1.29% on the day. The volume in the stock stood at 35.79 lakh shares today, compared to the daily average of 63.85 lakh shares in last one month. The benchmark September futures contract for the stock is quoting at Rs 171.08, down 2% on the day. GAIL (India...