विसंगत जोडी ओळखा. A. नायट्रोजन : हवा B. हायड्रोजन : पाणी C. युरेनियम : नाणी D. सल्फर : माचिस

Each correct pair names an element found in the thing: nitrogen in air, hydrogen in water, sulphur in matchstick heads. Coins are not made of uranium (they use metals such as copper, nickel and steel), so Uranium : Coins is the odd pair.