This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins bonds and structure, Subject name: Biochemistry
Shoest peptide is: 
Select and explain. 
A. Angiotensin-I, B. Vasopressin, C. Angiotensin-II, D. Angiotensin-III
D: Angiotensin-III
Answer: D: Angiotensin-III 
Explanation: Shoest peptide is Angiotensin-III Made up of 7 amino acids, formed from Angiotensin-II after the removal of an amino acid from N-terminal Angiotensin III has same efficacy as Angiotensin II for the secretion of aldosterone.