Which of the following is a branched polymer, having branched chain polysaccharide units ?

Options

A. Starch
B. Bakelite
C. High density polyethylene
D. Nylon

Answer

To determine which of the given options is a branched polymer with branched chain polysaccharide units, we need to analyze each option provided:

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Starch
- B) Bakelite
- C) High Density Polyethylene (HDPE)
- D) Nylon

2. **Analyze Bakelite**:
- Bakelite is a synthetic polymer made from phenol and formaldehyde. Its structure includes benzene rings and does not contain any polysaccharide units. Therefore, Bakelite is not a branched polymer with branched chain polysaccharide units.

3. **Analyze High Density Polyethylene (HDPE)**:
- HDPE is a thermoplastic polymer made from the polymerization of ethylene. Its structure consists of long chains of repeating CH2 units. There are no polysaccharide units present in HDPE, making it an incorrect option.

4. **Analyze Nylon**:
- Nylon is a synthetic polymer made from the condensation of diamines and dicarboxylic acids. Its structure includes amide linkages and does not contain any sugar molecules. Thus, Nylon is also not a branched polymer with branched chain polysaccharide units.

5. **Analyze Starch**:
- Starch is a natural polysaccharide made up of glucose units. It consists of two components: amylose (linear) and amylopectin (branched). Amylopectin has both α(1→4) and α(1→6) glycosidic linkages, which create a branched structure. Therefore, starch is a branched polymer with branched chain polysaccharide units.

6. **Conclusion**:
- After analyzing all the options, the only branched polymer with branched chain polysaccharide units is **Starch (Option A)**.

### Final Answer:
**A) Starch**