<prompt> Marker of bone resorption Osteoclast marker is:Alkaline phosphataseProcollagen 1 N propeptideC - telopeptideOsteocalcin  <response>: C i.e. C-telopeptideRef: Robbins Pathology, 9th edition, page 1180Explanation:Biochemical Markers of Bone ResorptionAmino and carboxy terminal crosslinking telopeptide of bone collagen.Pyridinoline.Free lysyl-pyridinoline.Tartarate-resistant acid phosphatase TRAP.Hydroxyproline not very specific. 