# 1H NMR splitting of 3-methyl-1-butanol

I have a question about 1H NMR splitting of 3-methyl-1-butanol.

The spectrum looks as the following.

The assignment of the NMR spectrum is the following.

Assign.     Shift(ppm)

A             3.673
B             1.66
C             1.57
D             1.49
E             0.922


So based on the results, A hydrogen is splitted into triplet. Is this splitted by D hydrogen? If so, why not C hydrogen on the alcohol group?