UPSC CSE Prelims
Question 93
There is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why?
- They can accumulate in the environment, and contaminate water and soil.
- They can enter the food chains.
- They can trigger the production of free radicals.
Select the correct answer using the code given below.
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation: Some engineered nanoparticles can persist or migrate in the environment, enter food webs and cause oxidative stress through reactive oxygen species.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - Certain nanoparticles can accumulate in soil or water and become contaminants.
Statement/Item 2: Correct - Nanoparticles may move through organisms and food chains.
Statement/Item 3: Correct - Some particles induce free-radical formation and oxidative cellular damage.
Option-wise Analysis:
A: Incorrect - omits correct statement/item 3.
B: Incorrect - omits correct statement/items 1, 2.
C: Incorrect - omits correct statement/item 2.
D: Correct - includes all and only the correct items.