What are Stereoisomers?
(a) Isomers having a same molecular formula and same configuration
(b) Isomers having a same molecular formula but different configuration
(c) Isomers having a different molecular formula but the same configuration
(d) Isomers having a different molecular formula and different configuration
I had been asked this question during an online exam.
The doubt is from E and Z Nomenclature of Geometric Isomers in division Structure and Stereostructure of Molecules of Engineering Chemistry I