insulin Questions

Statements related to human insulin are given below: Which statement(s) is/are correct about genetically engineered Insulin?(a) Pro-hormone insulin contain extra stretch of C-peptide.(b) A-peptide and B-peptide chains of insulin were produced separately in E. coli, extracted and combined by creating a disulphide bond between them.(c) Insulin used for treating Diabetes was extracted from Cattles and Pigs.(d) Pro-hormone insulin needs to be processed for converting into a mature and functional hormone.(e) Some patients develop allergic reactions to the foreign insulin.Choose the correct answer from the options given below: