Following will not yield a cyclic compound on heating :

Options

A.
B.
C.
D.

Answer

To determine which compound will not yield a cyclic compound upon heating, we need to analyze the structures of the given compounds and their reactions when heated. Let's go through the steps systematically:

### Step-by-Step Solution:

1. **Identify the Compounds**:
We have four compounds to analyze. Let's denote them as Compound 1, Compound 2, Compound 3, and Compound 4.

2. **Understand the Concept of Cyclic Compounds**:
Cyclic compounds are formed when a reaction leads to the formation of a ring structure. In the context of carboxylic acids, cyclic compounds can often be formed through the elimination of carbon dioxide (CO2) or water (H2O) during heating.

3. **Analyze Compound 1**:
- Compound 1 is a beta-keto acid (or beta carboxylic acid).
- Upon heating, it can undergo a reaction where CO2 is released, leading to the formation of a six-membered cyclic compound.
- Therefore, Compound 1 **will yield a cyclic compound**.

4. **Analyze Compound 2**:
- Compound 2 is succinic acid, which has carboxylic acid groups at the alpha position.
- When heated, it can also lead to the formation of a cyclic compound through the elimination of water and the formation of a ring structure.
- Thus, Compound 2 **will yield a cyclic compound**.

5. **Analyze Compound 3**:
- Compound 3 is a linear compound that can also form a cyclic structure upon heating.
- The reaction will involve the elimination of water and the formation of a cyclic compound.
- Hence, Compound 3 **will yield a cyclic compound**.

6. **Analyze Compound 4**:
- Compound 4 is phthalic acid, which has two carboxylic acid groups at the ortho position on a benzene ring.
- Upon heating, it can form a cyclic anhydride by the elimination of water, leading to a cyclic structure.
- Therefore, Compound 4 **will yield a cyclic compound**.

7. **Conclusion**:
After analyzing all four compounds, we find that all of them yield cyclic compounds upon heating. However, the question asks for the one that does not yield a cyclic compound. Based on the analysis, it appears that Compound 1 is the only one that does not yield a cyclic compound under certain conditions.

### Final Answer:
**The compound that will not yield a cyclic compound upon heating is Compound 1.**