Part of Castor seed that yields oil is
(a) Caruncle
(b) Endsoperm
(c) Nucellus
(d) Cotyledon

Options

A. Caruncle
B. Endsoperm
C. Nucellus
D. Cotyledon

Answer

To determine which part of the castor seed yields oil, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Castor Seed Structure**:
- The castor seed consists of several parts: the caruncle, endosperm, nucellus, and cotyledon. Each of these has a specific function.

2. **Analyzing Each Option**:
- **(a) Caruncle**:
- The caruncle is a structure found on the seed coat. It is not involved in oil production. Therefore, this option is incorrect.

- **(b) Endosperm**:
- The endosperm is the part of the seed that provides nutrition to the developing embryo. In the case of castor seeds, the endosperm is rich in oil and is the primary source of oil extraction. This makes this option correct.

- **(c) Nucellus**:
- The nucellus is part of the ovule and serves as a tissue that can store food, but it is not the main source of oil in the castor seed. Thus, this option is incorrect.

- **(d) Cotyledon**:
- The cotyledon is the first leaf that develops from the seed. While it may store some nutrients, it is not the main source of oil in castor seeds. Therefore, this option is also incorrect.

3. **Conclusion**:
- Based on the analysis, the part of the castor seed that yields oil is the **endosperm**.

### Final Answer:
(b) Endosperm

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