Which of the following is the maximum multiplicity observed for Hb protons in the following compound? Assume that Jab and Jbc values are different. 
Definitions:
Triplet
A term used in quantum mechanics and spectroscopy that describes a state of a system (such as an electron) with a spin quantum number of 1, indicating three possible orientations.
Doublet
A splitting pattern in spectral analysis (NMR) showing two peaks of equal intensity, indicating the presence of two magnetic nuclei split by coupling.
NMR Data
Information obtained from nuclear magnetic resonance spectroscopy, used to determine the structure of molecules by analyzing the interaction of atomic nuclei with magnetic fields.
Singlet
A term used in spectroscopy to describe a system (often an atom or a nucleus) in its lowest energy state, or when a peak appears alone in a spectrum without splitting.
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