Turner syndrome affects girls/women which results when X-chromosome is missing partially or completely.
Triploidy is rare chromosomal abnormality where fetus have an extra set of chromosomes in their cells.
When there is an extra X-chromosome in females, it results in super femaleness.
Down syndrome occurs when an individual has a full or partial copy of chromosome 21.

Explanation:
The correct answer is option 'D' - Down Syndrome.

Down Syndrome:
Down Syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21. People with Down Syndrome typically have 47 chromosomes instead of the usual 46. This additional copy of chromosome 21 leads to various physical and intellectual disabilities.

Characteristics of Down Syndrome:
1. Intellectual Disability: Individuals with Down Syndrome often have mild to moderate intellectual disabilities. Their cognitive abilities and learning skills may be delayed compared to individuals without Down Syndrome.
2. Physical Features: People with Down Syndrome typically have certain physical characteristics, including:
- Slanted eyes with an upward slanting of the eyelids
- Flat facial profile
- Small ears
- Short stature
- Poor muscle tone
- Single crease across the palm (known as a "simian crease")
3. Developmental Delays: Children with Down Syndrome may experience delays in their physical, cognitive, and language development. They may take longer to reach developmental milestones such as sitting up, crawling, and walking.
4. Medical Conditions: Individuals with Down Syndrome have an increased risk of certain medical conditions, including:
- Congenital heart defects
- Hearing loss
- Vision problems
- Thyroid disorders
- Gastrointestinal issues
- Respiratory infections
- Leukemia (increased risk)
5. Behavioral and Emotional Characteristics: People with Down Syndrome may exhibit certain behavioral and emotional characteristics, including:
- Mild to moderate behavioral problems
- Emotional sensitivity
- Social difficulties
- Speech and language difficulties

Conclusion:
A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by Down Syndrome. Down Syndrome is a genetic disorder that leads to physical and intellectual disabilities. Individuals with Down Syndrome have distinct physical features, developmental delays, and an increased risk of certain medical conditions.