<prompt> Wolffs law is:-Epiphyseal centre which appears first unites last with diaphysisEpiphyseal centre which appears first unites first with diaphysis.Osteogenesis is directly propoional to stress and strain.None of above.  <response>: 1 Wolffs law:- osteogenesis is directly propoional to stress and strain. 2 Law of union of epiphysis:- The epiphysis which appears first unites last with the diaphysis and vice versa. In fibula, the law is violated. 