<h1>Rupee weakness deepens as higher crude prices, dollar strength and foreign selling weigh on currency and reserves.</h1> The rupee weakened sharply to a historic low against the US dollar amid sustained pressure from higher crude oil prices, a stronger greenback, foreign investor selling, and energy-led inflation concerns. India's foreign exchange reserves also declined during the reporting week, driven by a fall in gold reserves. The government indicated plans to mobilise substantial borrowing through dated securities in the April-September period, while noting a reduction in gross market borrowing after G-Sec switches.