This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
True about structure of protein is 
Select and explain. 
A. SECONDARY structure is 3D, B. SECONDARY structure stabilized by disulfide bonds, C. secondary structure and teiary structure depends on amino acid, D. Primary,secondary,teiary structure is destroyed on heating
B: SECONDARY structure stabilized by disulfide bonds
Answer: B: SECONDARY structure stabilized by disulfide bonds 
Explanation: ref : lipincott 6th ed