Which of the following are alkaloids ?

Options

A. Cellulose
B. Codeine
C. Morphine
D. Both (b) and (c)

Answer

To determine which of the following options are alkaloids, we need to analyze each option provided:

1. **Cellulose**: This is a polysaccharide and a major component of plant cell walls. It is not an alkaloid.

2. **Codeine**: This is a natural occurring alkaloid derived from the opium poppy. It has analgesic (pain-relieving) properties and mimics the actions of endogenous opioids by binding to opioid receptors in the central nervous system.

3. **Morphine**: This is also a natural occurring alkaloid, obtained from the opium poppy. It is used as a medication for pain relief and acts directly on the central nervous system.

4. **Both B and C**: Since both Codeine and Morphine are alkaloids, this option is also correct.

Based on this analysis, the correct answer to the question "Which of the following are alkaloids?" is **option D: both B and C (Codeine and Morphine)**.

### Step-by-Step Solution:
1. **Identify the options**: List the given options to analyze them.
2. **Analyze each option**:
- **Cellulose**: Not an alkaloid.
- **Codeine**: Yes, it is an alkaloid.
- **Morphine**: Yes, it is an alkaloid.
3. **Determine the correct answer**: Since both Codeine and Morphine are alkaloids, the correct answer is option D.