Q204687 - PUC-PR Redator Júnior - Bilingue 2010

Look at the strip story below and answer the question that follows it.

In the sentence “It´s hard to get mad at someone who returns things so promptly” the relative pronoun “who” is being used to define the subject of a relative clause. Look at the sentences below and select the ones in which the underlined relative pronoun is used correctly. 
I. The girl in pink is the one  that I told you about.
II. Peter went to the restaurant which I eat.
III. The woman whose we met at the mall is a teacher.
IV. Do you know the Japanese guy with whom I travelled?