write a balanced chemical equation that shows the two glycine molecules joined together by a condensation reaction

The answer is 4 i don't know if its right let me see.

The answer is not c

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.