Contain(s) propionic and acetic acid side chains on pyrrole rings:

1. Uroporphyrinogen I
2. Uroporphyrin III

1. A only
2. B only
3. Both A and B
4. Neither A or B

Right

Uro- denotes propionic and acetic acid groups.

Copro- denotes propionic acid and methyl groups.

Proto- denotes propionic acid, methyl and vinyl groups.

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