Limnology is related to

Options

A. study of fresh-waters
B. grasslands
C. oceanography
D. epiphytic plants

Explanation

### Step-by-Step Solution:

1. **Understanding Limnology**: Begin by defining what Limnology is. Limnology is the scientific study of inland waters, which includes lakes, rivers, reservoirs, wetlands, and groundwater.

2. **Identifying the Options**: The question provides four options:
- Option 1: Study of freshwater
- Option 2: Grassland
- Option 3: Oceanography
- Option 4: Apophytic plant

3. **Analyzing Each Option**:
- **Option 1 (Study of freshwater)**: This is directly related to Limnology, as it encompasses the study of freshwater bodies such as lakes and rivers.
- **Option 2 (Grassland)**: This is not related to Limnology, as it pertains to terrestrial ecosystems.
- **Option 3 (Oceanography)**: This is the study of oceans and marine environments, which is distinct from Limnology.
- **Option 4 (Apophytic plant)**: This term refers to a type of plant and does not relate to the study of water bodies.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 1: Study of freshwater**. Limnology focuses specifically on the study of inland waters, which primarily includes freshwater ecosystems.