Based on mode of action, activated clay exerts what type of effect?

Correct option is C

Correct answer – (c) Activated clay works mainly by physical action on insects. It causes abrasion and disrupts the protective wax layer. This leads to desiccation and insect mortality.
Information Booster / Facts Clay-based products are safer and eco-friendly in pest management. They are useful in stored grain and field pest control.
Why other options are incorrect (a) Protoplasmic diffusion is typical of some chemical poisons. (b) Nerve poison action occurs in insecticides like organophosphates. (d) Chitin inhibition is seen in IGRs like diflubenzuron.