Rickets: Vitamin D Deficiency Causing Bone Deformities

Steps:

• Identify key symptoms: soft, deformed bones in children point to impaired bone mineralization.
• Recall common deficiency diseases: rickets results from insufficient vitamin D or calcium, affecting bone health.
• Match to options: Option A directly names rickets and its causes.
• Eliminate mismatches: Other options describe unrelated deficiencies and symptoms.

Why A is correct:

• Rickets is defined as a childhood disorder from vitamin D and calcium deficiency, leading to softened bones (osteomalacia in kids) due to poor calcium absorption.

Why the others are wrong:

• B: Anemia from iron deficiency causes blood issues like fatigue, not bone deformities; calcium is irrelevant.
• C: Scurvy from vitamin C deficiency causes connective tissue problems like bleeding gums and poor wound healing.
• D: Option incomplete, providing no valid disease or cause.

Final answer: A