Select the events that occur in the interphase stage of cell-cycle .
(a) RNA and protein synthesis.
(b) Cytoplasmic growth.
(c) Synthesis of spindle fibres protein.
(d) Disappearance of Golgi body and ER.

Options

A. a and d only
B. a , b and c only
C. b, c and d only
D. c and d only

Answer

To solve the question regarding the events that occur during the interphase stage of the cell cycle, we need to analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Interphase**:
Interphase is the stage of the cell cycle where the cell prepares for division. It consists of three phases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2). During this time, the cell grows, duplicates its DNA, and prepares for mitosis.

2. **Analyzing Option (a) - RNA and protein synthesis**:
- RNA and protein synthesis occur during the G1 and G2 phases of interphase. Therefore, this event does occur during interphase.
- **Conclusion**: This option is correct.

3. **Analyzing Option (b) - Cytoplasmic growth**:
- Cytoplasmic growth is a significant part of interphase, especially during the G1 phase, where the cell increases in size and prepares for DNA replication.
- **Conclusion**: This option is correct.

4. **Analyzing Option (c) - Synthesis of spindle fibers protein**:
- The synthesis of spindle fiber proteins occurs during the G2 phase of interphase as the cell prepares for mitosis. Thus, this event is also part of interphase.
- **Conclusion**: This option is correct.

5. **Analyzing Option (d) - Disappearance of Golgi body and ER**:
- The disappearance of the Golgi body and endoplasmic reticulum occurs during prophase, which is part of the M phase (mitosis), not during interphase.
- **Conclusion**: This option is incorrect.

### Final Answer:
The events that occur in the interphase stage of the cell cycle are:
- (a) RNA and protein synthesis
- (b) Cytoplasmic growth
- (c) Synthesis of spindle fibers protein

Thus, the correct options are A, B, and C only.