Reason (R): Both experience action and reaction which are equal and opposite.
Solution:
Assertion (A) is false: When two particles interact, they exert forces on each other. Unless these interaction forces are exactly balanced by other external forces, the net force on *either* particle will generally *not* be zero, causing them to accelerate. Only the net force on the *system* of two interacting particles is zero (if no external forces are present).
Reason (R) is true: According to Newton's third law, when two particles interact, they exert action and reaction forces on each other which are always equal in magnitude and opposite in direction. Given that (A) is false and (R) is true, and option 'A is false but R is true' is not explicitly provided, option (4)
'Both (A) and (R) are false' is selected as it correctly identifies (A) as false.
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