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: Surgery
[{'content': "Looser's zone is present in September 2010 March 2013 (a, f) \nSelect and explain. \nA. Multiple myeloma, B. Osteomalacia, C. Pseudoparathyroidism, D. Osteoporosis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Osteomalacia Pseudo-fracture (Looser zone): A lucent band of decreased coical density Perpendicular to bone surface Often multiple, +/- symmetrical +/- callus formation "Pathognomonic" of osteomalacia and seen on compressive (concave) side (eg, prox femur) Also seen in Paget dz on tensile (convex) side', 'role': 'assistant'}]