The product of two negative rational numbers is always positive

C

The reciprocal of a positive rational number is always positive

D

The product of two positive rational numbers is always positive

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Solution

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Correct option is A)

Zero can't have a reciprocal because $1/0$ is not defined. The rest statements are $(−a)×(−b)=ab$ Reciprocal of $a$ is $1/a$ $a×b=ab$ where $a$ and $b$ are positive.