US President Joe Biden listens as India's Prime Minister Narendra Modi speaks during a 'Quad nations' meeting at the Leaders' Summit of the Quadrilateral Framework held in the East Room at the White House in Washington, US, Sept 24, 2021. Reuters

US President Joe Biden has said only India among the Quad group of countries was "somewhat shaky" in acting against Russia over its invasion of Ukraine, as India tries to balance its ties with Russia and the West.