Reaction of white phosphorus with sulfur gives a mixture of products A, B and C. The ³¹P NMR spectral features of the resultant mixture are shown below.

The products A, B and C, respectively, are

Correct option is A

Phosphorus-31 NMR spectroscopy is an analytical chemistry technique that uses nuclear magnetic resonance (NMR) to study chemical compounds that contain phosphorus.
In

​​​​​​​ , phosphorus atoms of type a will give a doublet by coupling with phosphorus atom of type b. Similarly, phosphorus atom of type b will give a quartet due to three phosphorus atoms of type a.
In

, all the phosphorus atoms are same and a singlet will be observed.
In

, two phosphorus atoms of type a will give a triplet by coupling with two phosphorus atoms of type b. Also, two phosphorus atoms of type b will give a triplet by coupling with two phosphorus atoms of type a.