<prompt> The most severe form of Ehler Danlos syndrome isType 1Type 8Type 4Type 2  <response>: Ehlers danlos syndrome A genetic defect in the synthesis of fibrillar collagenOf all the types, type IV vascular type is the most severe form as it involves internal organsCommon type - Type VI kyphoscoliosis type caused due to a defect in lysyl hydroxylaseType VII - defect in type 1 collagenType IV - Defect in type 3 collagenType I and II - Defect in type 5 collagen Ref: Robbins 8e p146 