How many pyrrole rings are there in porphyrin?

Options

(a) one
(b) two
(c) three
(d) four

Correct Answer:

four

Explanation:

Four pyrrole rings are there in porphyrin. Chlorophyll structure was studied by Wilstatler, Stoll and Fisher in 1912. It has a tadpole like structure with head called porphyrin and a tail made up of long chain alcohol called phytol. Porphyrin head is made up of four pyrrole rings. Which are linked by methane bridges (-ch =)