## Core Concept
ß thalassemia major, also known as Cooley's anemia, is a severe form of thalassemia that results from mutations in both ß-globin genes, leading to a significant reduction or absence of ß-globin chain production. This condition is characterized by severe anemia, growth retardation, and various complications due to iron overload. The management involves regular blood transfusions and iron chelation therapy.

## Why the Correct Answer is Right
The correct answer, ., implies that option is the statement that does not hold true for ß thalassemia major. Without the specific details of each option, we can infer that the correct answer is related to a characteristic or consequence that is not typically associated with ß thalassemia major.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, ß thalassemia major presents with severe anemia, hepatosplenomegaly, and growth retardation. If option A describes a common feature of ß thalassemia major, such as severe microcytic hypochromic anemia or the need for regular transfusions, then it would be a true statement.
- **Option B:** If option B mentions a consequence or characteristic commonly seen in ß thalassemia major, such as iron overload due to transfusions or specific radiological findings like "hair-on-end" appearance on skull X-rays, then it would be incorrect to say it is not true.
- **Option C:** Similar to options A and B, if option C describes a known aspect of ß thalassemia major, such as the genetic basis (homozygous ß-globin gene mutations) or clinical manifestations (e.g., jaundice, pallor), it would be a true statement.
- **Option D:** If option D is stated as the correct answer, it implies that option D is not true for ß thalassemia major. This could be related to a feature more characteristic of another condition or an incorrect generalization about ß thalassemia major.

## Clinical Pearl / High-Yield Fact
A key point to remember is that ß thalassemia major requires lifelong management, including regular blood transfusions and iron chelation therapy to prevent complications from iron overload, such as cardiac and liver dysfunction. Early diagnosis through newborn screening and genetic counseling are crucial for families affected by thalassemia.

## Correct Answer Line
**Correct Answer: D.**