Anatomy A 70-year-old man comes to casualty with urinary retention and back pain. Which investigation should be performed – A Serum acid phosphatase B Serum Calcium C Serum alkaline phosphatase D Serum electrophoresis 💡 Explanation A 70-year-old man comes to casualty with urinary retention and back pain. Which investigation should be performed - ✓ Correct Answer: A. Serum acid phosphatase