## **Core Concept**
Rickets is a disease caused by vitamin D deficiency, leading to softening and weakening of bones in children. Radiological changes in rickets are characteristic and help in its diagnosis. These changes occur due to defective mineralization of bone tissue.

## **Why the Correct Answer is Right**
The correct answer, ., includes features such as:
- **Cupping and fraying of metaphyses**: This is due to the undermineralization of the growth plate cartilage and the adjacent bone.
- **Widening of the growth plates**: The growth plates appear widened due to the accumulation of uncalcified cartilage.
- **Bowing of long bones**: Weight-bearing bones may bow due to softening.
- **Trümmerfeld zone or zone of rarefaction**: A region of decreased density beneath the cortex.

These changes are a result of impaired mineralization and are pathognomonic for rickets.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option does not accurately describe the characteristic changes seen in rickets.
- **Option B:** Similarly, this option lacks the specific features associated with rickets.
- **Option C:** This is incorrect as it does not represent the typical radiological findings of rickets.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that rickets can be diagnosed and monitored with radiographs showing characteristic changes, especially in the wrists and knees. The presence of a **Trümmerfeld zone** is highly suggestive of rickets.

## **Correct Answer:** .