Mumbai, Feb. 17 -- The Indian rupee gained 5 paise to settle at 90.69 (provisional) against the US dollar on Tuesday, backed by positive domestic equity markets and lower crude prices overseas. Indian shares eked out modest gains on Tuesday amid easing tensions surrounding Iran and Russia. The benchmark BSE Sensex recovered from an early slide to end the session up 173.81 points, or 0.21 percent, at 83,450.96. The broader NSE Nifty index inched up by 42.65 points, or 0.17 percent, to 25,725.40 while the BSE mid-cap and small-cap indexes rose 0.3 percent and 0.9 percent, respectively. IT stocks bounced back after recent string of losses, with Infosys climbing nearly 2 percent after saying that artificial intelligence services accounted for...