Ores of calcium are

Options

A. gypsum, colemanite, hydrolith
B. quick lime, limestone, pearl ash
C. quick lime, fluorapatite, feldspar
D. carnallite, pearly ash, feldspar

Explanation

To determine the ores of calcium from the given options, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the Ores of Calcium**:
- Ores are naturally occurring solid materials from which a metal or valuable mineral can be extracted profitably. For calcium, we are looking for compounds that contain calcium.

2. **Examine Option A**:
- **Gypsum**: This is calcium sulfate dihydrate (CaSO4·2H2O). It contains calcium.
- **Silomonide**: This is calcium borate (CaB6O5·H2O). It contains calcium.
- **Hydrolith**: This is calcium hydride (CaH2). It contains calcium.
- **Conclusion for Option A**: All three compounds contain calcium, making this option valid.

3. **Examine Option B**:
- **Quick Lime**: This is calcium oxide (CaO). It contains calcium.
- **Limestone**: This is calcium carbonate (CaCO3). It contains calcium.
- **Pearl Ash**: This is potassium carbonate (K2CO3). It does not contain calcium.
- **Conclusion for Option B**: Since pearl ash does not contain calcium, this option is invalid.

4. **Examine Option C**:
- **Limestone**: This is calcium carbonate (CaCO3). It contains calcium.
- **Fluorapatite**: This is calcium phosphate fluoride (Ca5(PO4)3F). It contains calcium.
- **Feldspar**: This is a group of minerals that do not contain calcium (general formula K2O·Al2O3·6SiO2).
- **Conclusion for Option C**: Since feldspar does not contain calcium, this option is invalid.

5. **Examine Option D**:
- **Carnalite**: This is potassium magnesium chloride hydrate (KCl·MgCl2·6H2O). It does not contain calcium.
- **Pearl Ash**: As discussed earlier, it does not contain calcium.
- **Feldspar**: As discussed earlier, it does not contain calcium.
- **Conclusion for Option D**: Since none of the compounds contain calcium, this option is invalid.

6. **Final Conclusion**:
- The only option that contains ores of calcium is **Option A** (Gypsum, Silomonide, and Hydrolith).

### Final Answer:
The ores of calcium are found in **Option A**.