This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic disorders - 1, Subject name: Orthopaedics
A patient presented with following serum parameters: Normal serum ALP, normal PTH level and increased Ca+ and PO4. Most likely cause: 
Select and explain. 
A. Vitamin D increase, B. Hyperparathyroidism, C. Osteoporosis, D. Osteomalacia
A: Vitamin D increase
Answer: A: Vitamin D increase 
Explanation: Bio-Chemical Changes Osteoporosis Osteomalacia Hyperparathyroidism Calcium Normal |/Normal Increased Phosphate Normal | Low (phosphateuria) ALP Normal - PTH - - Hyper toxicity of Vit-d: | Ca &Phosphate levels