Photochemical smog consists of excessive amount of X in addition to aldehydes, ketones , PAN etc, X is

Options

A. Methane
B. Carbon monoxide
C. ozone
D. carbondioxide

Explanation

To solve the question regarding photochemical smog, we need to identify the excessive amount of substance X that is present alongside aldehydes, ketones, and PAN (peroxyacyl nitrate).

### Step-by-Step Solution:

1. **Understanding Photochemical Smog**:
Photochemical smog is a type of air pollution that occurs when sunlight reacts with pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). This reaction leads to the formation of various harmful substances.

2. **Identifying Components of Photochemical Smog**:
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