Assertion (A) All collision of reactant molecules lead to product formation.
Reason (R) Only those collisions in which molecules have correct orientation and sufficent kinetic energy kinetic energy lead to compound formation.

Options

A. Both assertion and reason are correct and the reason in correct explanation of assertion.
B. Both assertaion and reason are correct, but the reason does not explain essertion
C. Assertion is correct but reason is incorrect
D. Assertion is incorrect, but reason is correct

Explanation

Assertion is incorrect,but reason is correct.
Correct assertion is ''only effective collision lead to formation of product.'' Reason defines correct meaning of effective collision, and criterion of collision theory for complertion of reaction.
Only those collision in which molecules have correct orientation and suffiecnt energy lead to formation of product.