The possibility of photochemical smog formation will be minimum at

Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight. The average temperature of Kashmir in January is estimated to be $- 3 . 6 ° C$ in Srinagar, $- 11 . 8 ° C$ in Pahalgam, and $- 10 . 4 ° C$ in Gulmarg as their minimum temperatures.