Civil Services TNPSC Group 1 (New Syllabus) Mock Test 2025 General Knowledge Science Technology and Inventions
Consider the following statements:
1. Other than those made by humans, nanoparticles do not exist in nature.
2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.
3. Nanoparticles of same commercial products which enter the environment are unsafe for humans.
Which of the statements given above is/are correct?
1
1 only
2
3 only
3
1 and 2
4
2 and 3