As the particles of a solid undergo sublimation , they?

When a solid undergoes sublimation it goes from a solid to a gas

The se-ci  bonds is more polar  than s-br bond

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.