Final answer:
Paget's disease is associated with elevated serum alkaline phosphatase and elevated urinary hydroxyproline levels.
Step-by-step explanation:
Paget's disease is associated with elevated serum alkaline phosphatase and elevated urinary hydroxyproline levels.
Alkaline phosphatase is an enzyme found in bone tissue and is typically elevated in patients with Paget's disease. Hydroxyproline is a marker of bone resorption, and increased levels in the urine suggest increased bone turnover, which is a characteristic feature of Paget's disease.
Therefore, the correct answer is B. Paget disease.