This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Rickets is due to -a) Loss of calcium in urineb) Increased mobilisation of calcium from bonec) Decreased absorption of calciumd) Loss of phosphate in Urine 
Select and explain. 
A. ab, B. bc, C. bd, D. cd
D: cd
Answer: D: cd 
Explanation: Rickets is a metabolic disorder characterized by deficient mineralization of bone.
Rickets may be due to : -


Vit D deficient → ↓ absorption of calcium (Vit D dependent rickets).
Increased phosphate excretion due to defective reabsorption → Vit D resistant rickets.