<prompt> True regarding development of hea isare AEDorsal mesocardium forms transverse pericardial sinusMyosites arise from splanchopleuric mesodermPurkinje fibers develop from somatopleuric mesodermNeural crest cells have role in development of muscular sub pulmonary infundibulum  <response>: C i.e. Purkinje fibers develop from somatopleuric mesoderm 