1. (B) Always act on different bodies in opposite directions. According to third law of motion, action and reaction always act on different bodies in opposite directions.

    (B) Always act on different bodies in opposite directions.
    According to third law of motion, action and reaction always act on different bodies in opposite directions.

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  2. a. To reduce the emission of sulphur dioxide in exhaust fumes

    a. To reduce the emission of sulphur dioxide in exhaust fumes

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