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कौन सा विकल्प पाठ को इस प्रकार पूरा करता है कि वह मानक अंग्रेजी के व्याकरण नियमों के अनुकूल हो? In 2015, a team led by materials scientists Anirudha Sumant and Diana Berman succeeded in reducing the coefficient of friction (COF) between two surfaces to the lowest possible level-superlubricity. A nearly frictionless (and, as its name suggests, extremely slippery) state, ______