Biological molecules — practice question

Which option identifies the chemical elements present in proteins?

• Acarbon ✓, hydrogen ✓, oxygen ✓, nitrogen ✓
• Bcarbon ✓, hydrogen ✓, oxygen ✓, nitrogen ✗
• Ccarbon ✓, hydrogen ✗, oxygen ✓, nitrogen ✗
• Dcarbon ✗, hydrogen ✓, oxygen ✗, nitrogen ✓