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Questions  >>  Olympiad-Math  >>  Class 10

Of the following two statements, both of which cannot be true, but both can also be false. Which are these two statements ? I.All machines make noise II. Some machines are noisy III. No machine makes noise IV. Some machines are not noisy

$(A) \; I \;and\;II \\(B)\; III \;and\;IV \\(C)\; I \;and\;III \\(D)\; II \;and \;IV$

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