A proton Hb is coupled to four equivalent protons Ha. The multiplicity and the relative intensity of lines in the signal Hb is?

A proton Hb is coupled to four equivalent protons Ha. The multiplicity

1.	A proton Hb is coupled to four equivalent protons Ha. The multiplicity and the relative intensity of lines in the signal Hb is?
A.	Doublet, I : 4
B.	Triplet, I : 4 : 6
C.	Quintet, 1 : 4 : 6 : 4 : 1
D.	Quartet, 1 : 4 : 6 : 4
Answer» D. Quartet, 1 : 4 : 6 : 4