Which of the following compounds can show Optical isomerism as well as Geometrical isomerism?
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Optical isomerism requires a chiral center (asymmetric carbon). Geometrical isomerism requires restricted rotation (e.g., double bond or ring) and two different groups on each carbon.
Analyzing the options:
The first compound has a chiral carbon (C* with four different groups: H, CH3, COOH, C2H5) and a C=C bond with two different groups on each carbon (H/CH3 and H/C2H5), satisfying both conditions.
The other compounds lack either a true chiral center or the necessary substituents on the double bond for geometrical isomerism.
Final Answer: The first compound (top-left image)