From among the isomeric compounds of molecular formula C4H9Cl, choose the one having a 1H NMR spectrum

Question:

From among the isomeric compounds of molecular formula C4H9Cl, choose the one having
a 1H NMR spectrum that
(a) Contains only a single peak
(b) Has several peaks including a doublet at δ 3.4 ppm
(c) Has several peaks including a triplet at δ 3.5 ppm
(d) Has several peaks including two distinct three-proton signals, one of them a triplet at δ 1.0 ppm and the other a doublet at δ 1.5 ppm