Identify possible configurations:
- Cis Configuration: Both - \(\mathrm{COOH}\) groups on the same side.
- Trans Configuration: -COOH groups on opposite sides.
Geometric Isomerism:
- 1 Cis isomer
- 1 Trans isomer
Optical Isomerism:
- Cis isomer can exist as two enantiomers (mirror images).
Count the stereoisomers:
- 1 Trans (achiral)
- 2 Cis (chiral enantiomers)
Total stereoisomers \(=1\) (Trans) +2 (Cis enantiomers) \(=3\)
