Answer :
EVERY ACTION HAS EQUAL AND OPPOSITE REACTION.
IF BODY A EXERTS FORCE ON BODY B(ACTION), THEN BODY B EXERTS FORCE ON BODY A (REACTION). THESE TWO FORCES HAVE SAME MAGNITUDE BUT ARE OPPOSITE IN DIRECTION. THESE TWO FORCES ACT ON DIFFERENT BODIES
IF BODY A EXERTS FORCE ON BODY B(ACTION), THEN BODY B EXERTS FORCE ON BODY A (REACTION). THESE TWO FORCES HAVE SAME MAGNITUDE BUT ARE OPPOSITE IN DIRECTION. THESE TWO FORCES ACT ON DIFFERENT BODIES
Every action has equal and opposite reaction.
OR
Action and Reaction are always equal in magnitude and opposite in direction.
OR
Action and Reaction are always equal in magnitude and opposite in direction.