Question

Match List-I with List-II

List-I		List-II
A	First generation pesticide	I	Highly toxic compounds
B	Second generation pesticide	II	Synthetic compounds
C	Third generation pesticide	III	Microbial insecticide
D	Transgenic pesticides	IV	Hormone analogue

Choose the correct answer from the options given below:

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)

Hint:

Remember the evolutionary steps of pesticides: 1st Gen = mineral poisons; 2nd Gen = synthetic chemicals; 3rd Gen = physiological disruptors (hormones); 4th Gen/Transgenics = molecular expression (Bt toxins).

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Pest control chemicals have evolved through generations based on chemical nature, specificity, and environmental impact.
Detailed Explanation:
- First Generation Pesticides (A): These represent early pesticides, primarily inorganic chemicals (such as arsenic, lead, and mercury) and early botanicals. They were broad-spectrum and had high mammalian toxicity, aligning with Highly toxic compounds (I).
- Second Generation Pesticides (B): These consist of synthetic organic chemicals developed starting in the 1940s, including DDT, organophosphates, and carbamates, aligning with Synthetic compounds (II).
- Third Generation Pesticides (C): These are biorational chemicals designed to disrupt physiological development, such as juvenile hormone mimics and ecdysone agonists, aligning with Hormone analogue (IV).
- Transgenic Pesticides (D): These refer to crop plants genetically modified to express microbial toxins internally (such as Bt cotton expressing delta-endotoxins), aligning with Microbial insecticide (III).
This yields the match: (A) - (I), (B) - (II), (C) - (IV), (D) - (III).

Step 2: Final Answer:
The correct choice is represented by option (4).