How many of the following statements is/are c | vedclass

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(D) Mercury is the only metal that exists as a liquid at room temperature. This is a correct statement.$(b)$ Among non-metals,carbon (in the form of d

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(D) Mercury is the only metal that exists as a liquid at room temperature. This is a correct statement.$(b)$ Among non-metals,carbon (in the form of diamond) has the highest melting point. This is a correct statement.$(c)$ Hydrogen is the most abundant element in the universe,accounting for approximately $75 \%$ of the elemental mass. This is a correct statement.$(d)$ Oxygen is the most abundant element in the earth's crust,comprising about $46.6 \%$ by mass. This is a correct statement.Therefore,all four statements are correct.

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