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Assertion: The distance between two para...

Assertion: The distance between two parallel planes `ax+by+cz+d=0 and ax+by+cz+d\'=0` is `(|d-d\'|)/sqrt(a^2+b^2+c^2)`, Reason: The normal of two parallel planes are perpendicular to each other. (A) Both A and R are true and R is the correct explanation of A (B) Both A and R are true R is not te correct explanation of A (C) A is true but R is false. (D) A is false but R is true.

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