Different cells have different sizes arrange the following cells in an ascending order of their size Choose the correct option among the followings
I.Mycoplasma
II.Ostrich eggs
III.Human RBC
IV.Bacteria

Options

A. I,IV,III,II
B. I,II,III,IV
C. II,I,III,IV
D. III,II,I,IV

Answer

To arrange the given cells in ascending order of their size, we need to first identify the approximate sizes of each cell type mentioned in the question:

1. **Mycoplasma**: These are the smallest known bacteria, measuring approximately 0.2 to 0.4 micrometers (µm) in size.
2. **Bacteria**: Typical bacteria range in size from about 1.1 to 1.5 micrometers (µm).
3. **Human RBC (Red Blood Cells)**: The diameter of human red blood cells is approximately 6.2 to 8.2 micrometers (µm).
4. **Ostrich Egg**: An ostrich egg is significantly larger, measuring about 15 centimeters (cm) in length, which is equivalent to 150,000 micrometers (µm).

Now, we can arrange these cells in ascending order based on their sizes:

1. **Mycoplasma**: 0.2 - 0.4 µm
2. **Bacteria**: 1.1 - 1.5 µm
3. **Human RBC**: 6.2 - 8.2 µm
4. **Ostrich Egg**: 15 cm (150,000 µm)

Thus, the ascending order of the cells based on their size is:
1. Mycoplasma
2. Bacteria
3. Human RBC
4. Ostrich Egg

### Final Answer:
**Ascending order of cell sizes: Mycoplasma < Bacteria < Human RBC < Ostrich Egg**