The instrument used to observe cells is ________

Options

A. Microscope
B. Telescope
C. Both (a) and (b)
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the instrument used to observe cells. Cells are microscopic structures that cannot be seen with the naked eye.

2. **Identifying the Instrument**: The instrument specifically designed for observing very small objects, including cells, is called a microscope.

3. **Function of the Microscope**: A microscope uses a combination of lenses to magnify tiny objects. This magnification allows us to see cells that are otherwise invisible to the naked eye.

4. **Conclusion**: Therefore, the answer to the question is that the instrument used to observe cells is a microscope.

**Final Answer**: The instrument used to observe cells is a microscope.

---