Interveinal necrotic spots on leaves appear due to A. HF injury B. SO2 injury C. NO2 injury D. O3 injury

The correct answer is D. O3 injury.

Ozone (O3) is a gas that is formed when oxygen (O2) molecules are split by ultraviolet radiation from the sun. Ozone is a major component of smog, and it can also be found in indoor air. Ozone is a respiratory irritant, and it can cause a variety of health problems, including asthma,

Interveinal necrotic spots are small, dead areas that appear between the veins of leaves. These spots are caused by the death of cells in the leaf, and they can be caused by a variety of factors, including ozone exposure. Ozone exposure can damage the cells in the leaf, and this damage can lead to the formation of interveinal necrotic spots.

HF injury, SO2 injury, and NO2 injury can also cause interveinal necrotic spots on leaves. However, ozone injury is the most common cause of interveinal necrotic spots on leaves.