From among the compounds chlorobenzene, o-dichlorobenzene, and p-dichlorobenzene, choose the one that (a) Gives the simplest 1H

Question:

From among the compounds chlorobenzene, o-dichlorobenzene, and p-dichlorobenzene, choose the one that
(a) Gives the simplest 1H NMR spectrum
(b) Gives the simplest 13C NMR spectrum
(c) Has three peaks in its 13C NMR spectrum
(d) Has four peaks in its 13C NMR spectrum