With regard to insulin choose the correct options.
(a) C-peptide is not present in mature insulin.
(b) The insulin produced by rDNA technology has C-peptide.
(c) The pro-insulin has C-peptide
(d) A-peptide and B-peptide of insulin are interconnected by disulfide bridges.
Choose the correct answer from the options given below
1
(a) and (d) only
2
(b) and (d) only
3
(b) and (c) only
4
(a), (c) and (d) only