The Indian rupee closed at 85.68 against the US dollar, extending its slip below the psychological level of 86 for the second session.The rupee appreciated by nine paise at market close on Wednesday, supported by easing inflation, a sliding dollar index, and lower oil prices.India's industrial production growth slowed to 2.9% in February, the weakest in six months, signaling a loss in domestic economic momentum.Lower crude prices bode well for the rupee, as India is a large importer.