Substances eliminated along with sebum

Options

A. hydrocarbons
B. sterols
C. waxes
D. all the above

Answer

### Step-by-Step Solution:

1. **Identify the Gland**: The question pertains to substances eliminated along with sebum, which is produced by sebaceous glands.

2. **Understand Sebum Composition**: Sebum is an oily substance that is secreted by sebaceous glands. It primarily consists of various organic compounds.

3. **List the Substances**:
- **Hydrocarbons**: These are organic compounds consisting entirely of hydrogen and carbon, and they are a component of sebum.
- **Sterols**: These are a subgroup of steroids and include compounds like cholesterol, which are also found in sebum.
- **Waxes**: These are long-chain fatty acids and alcohols that contribute to the protective barrier of the skin and are part of sebum.

4. **Conclusion**: Since sebum contains hydrocarbons, sterols, and waxes, the answer to the question is that all of these substances are eliminated along with sebum.

5. **Final Answer**: Therefore, the correct option is D) all of the above.