How many atoms of oxygen are in 30H?
1. 3
2. 4
3. 2
4. 1

It has to be b i hope this

Bis the

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.

The correct answer to this question is 28