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Assertion (A) : The formation of rust is...

Assertion (A) : The formation of rust is a chemical change.Reason (R) : For the formation of rust iron must be exposed to air and water.

A

Both A and R are true and R is the correct explanation of A.

B

Both A and R are true but R is not the correct explanation of A.

C

A is true but R is false

D

A is false but R is true.

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