Assertion : Lactic acid shows geometrical isomerism.
Reason : it has C = C bond.

Options

A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
B. Assertion and reason both are correct statements but reason is not correct explanation for assertion
C. Assertion AND reason is wrong statement
D. Assertion is wrong statement but reason is correct statement

Answer

To solve the question regarding the assertion and reason provided, we need to analyze both statements carefully.

### Step-by-Step Solution:

1. **Understanding Lactic Acid**:
- Lactic acid has the chemical formula \( C_3H_6O_3 \). It contains a hydroxyl group (-OH) and a carboxylic acid group (-COOH).

2. **Identifying Double Bonds**:
- The question claims that lactic acid shows geometrical isomerism due to the presence of a C=C double bond. However, we need to check if lactic acid contains such a double bond.
- In lactic acid, the structure is as follows:
\[ CH_3-CHOH-COOH \]
- There is no C=C double bond present in this structure. The only double bond present is in the carboxylic acid group (C=O), which does not contribute to geometrical isomerism.

3. **Geometrical Isomerism Requirement**:
- Geometrical isomerism (also known as cis-trans isomerism) occurs in compounds with a C=C double bond where different groups are attached to the carbon atoms of the double bond.
- Since lactic acid does not have a C=C bond, it cannot exhibit geometrical isomerism.

4. **Conclusion on Assertion and Reason**:
- The assertion that "Lactic acid shows geometrical isomerism" is **false**.
- The reason that "it has a C=C bond" is also **false** because lactic acid does not contain a C=C bond.
- Therefore, both the assertion and reason are incorrect.

### Final Answer:
- Both the assertion and the reason are false.

---