Aminocentesis is a technique used to

Options

A. determine errors in amino acid metabolism in embryo
B. pin point specific cardiac ailments in embryo
C. determine any hereditary genetic abnormality in embryo
D. all of these

Explanation

### Step-by-Step Solution:

1. **Understanding Aminocentesis**:
- Aminocentesis is a medical procedure used during pregnancy to obtain a sample of amniotic fluid, which surrounds the fetus in the womb.

2. **Purpose of Amniotic Fluid**:
- The amniotic fluid contains fetal cells that can provide important information about the fetus, including genetic information.

3. **Analyzing the Options**:
- **Option A**: Determine errors in amino acid metabolism in the embryo.
- This option is not the primary purpose of amniocentesis.
- **Option B**: Pinpoint specific cardiac elements in the embryo.
- This option is also not a primary use of amniocentesis.
- **Option C**: Determine any hereditary genetic abnormality in the embryo.
- This is a significant use of amniocentesis, as it allows for the detection of genetic disorders.
- **Option D**: All of these.
- Since options A and B are not correct, this option cannot be correct.

4. **Conclusion**:
- The correct answer is **Option C**: determine any hereditary genetic abnormality in the embryo. This is the primary purpose of amniocentesis.