Amber codon is:: (A) UAA, (B) UAG, (C) UGA, (D) UAC
Answer is B. Terminator Codons/Stop Codons/Nonsense Codons
UAG --- Amber
UGA --- Opal
UAA --- Ochre
Exceptions
UGA can be recoded to Selenocysteine.
UAG can be recoded to Pyrrolysine.
UGA codes for Tryptophan in mitochondrial DNA.
Reference- Harper 30th edition Pg- 415