Which group of pesticides tends to irritate the skin, nose, and respiratory system?

• A. Borates
• B. Pyrethroids
• C. Organophosphates
• D. Carbamates

Answer: (A)

Local irritant effects are the key here. Borates are inorganic boron compounds used as pesticides that can irritate exposed skin, the nose, and the respiratory tract, especially when dust or mist is inhaled. Their primary hazard is this mucous-membrane irritation rather than systemic toxicity, which is why they’re the best fit for a question about irritation of the skin, nose, and lungs.

In contrast, organophosphates and carbamates are focused on systemic toxicity from cholinesterase inhibition, with signs like excessive salivation, sweating, and bronchoconstriction, not just irritation. Pyrethroids can irritate skin and eyes too, but the clear tendency toward mucous-membrane irritation described in the question points to borates.