**Core Concept**
Rickets is a disease caused by a lack of vitamin D, calcium, or phosphate. It leads to softening and weakening of the bones in children, resulting in skeletal deformities and growth impairment.

**Why the Correct Answer is Right**
Rickets is characterized by bowing of the legs, softening of the skull, and widening of the wrists and ankles. This is due to the impaired mineralization of bone matrix, which is essential for bone growth and development. The absence of vitamin D, calcium, or phosphate disrupts the normal function of osteoblasts, leading to the characteristic skeletal abnormalities.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a characteristic of rickets. Instead, rickets is often associated with an increased risk of infections, particularly respiratory tract infections.

**Option B:** This option is incorrect because it is not a specific feature of rickets. While it is true that rickets can lead to growth impairment, this is a nonspecific consequence of the disease rather than a defining characteristic.

**Option C:** This option is incorrect because it is actually a common complication of rickets. Children with rickets are at increased risk of developing osteomalacia, a condition characterized by softening of the bones in adults.

**Clinical Pearl / High-Yield Fact**
A key aspect of rickets is its association with impaired mineralization of bone matrix. This is due to the lack of vitamin D, calcium, or phosphate, which are essential for normal bone growth and development.

**Correct Answer:**
A.