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# Given below are two statements :

Question:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Photochemical smog causes cracking of rubber.

Reason (R) : Presence of ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate in photochemical smog makes it oxidizing.

Choose the most appropriate answer from the options given below :

1. Both (A) and (R) are true but (R) is not the true explanation of (A)

2. (A) is false but $\mathbf{( R )}$ is true.

3. (A) is true but (R) is false

4. Both (A) and (R) are true and (R) is the true explanation of (A)

Correct Option: , 4

Solution:

Photochemical smog causes cracking of rubber, the common component of photochemical smog are ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyle nitrate (PAN).