This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mutations & Codons, Subject name: Biochemistry
Amber codon is 
Select and explain. 
A. UAA, B. UAG, C. UGA, D. UGG
B: UAG
Answer: B: UAG 
Explanation: Name of Stop codons: UAG - Amber codon UGA - Opal codon UAA - Ochre codon