<prompt> Longest acting insulin isGlobal zinc suspensionInsulin- zinc suspensionNeutral protamine hagedorm NPHProtamine- zinc insulin  <response>: Protamine zinc insulin 259-KDT 6thTypes of Insulin Preparations and Insulin analogues1. Rapid acting- Insulin lispro, Insulin aspart, Insulin glulisine2. Short acting- Regular soluble insuline3. Intermediate acting- Insulin zinc suspension or Lente, Neutral protamine hagedorm NPH or Isophane insulin4. Long acting- Protamine zinc insulin PZI, Insulin glargine 