Khorana performed experiments to decipher the codons that code for a particular amino acid. The results of these experiments using synthetic mRNAs and the corresponding polypeptide repeats that were generated are given in the table below.

$\begin{array}{|l|l|}\hline \text{Synthetic mRNAs} & \text{Polypeptide(s) synthesized} \\ \hline \hline(\text {CAA})_n & (\text {Thr-Thr})_n \text{ and } (\text {Asn-Asn})_n \text{ and } (\text {Gln-Gln})_n \\ \hline(\text {UUC})_n & (\text {Ser-Ser})_n \text{ and } (\text {Leu-Leu})_n \text{ and } (\text {Phe-Phe})_n \\ \hline(\text {UAC})_n & (\text {Thr-Thr})_n \text{ and } (\text {Leu-Leu})_n \text{ and } (\text {Tyr-Tyr})_n \\ \hline(\text {UUAC})_n & (\text {Leu-Leu-Thr-Tyr})_n \\ \hline\end{array}$

Based on the results, the correct combination(s) of codons and amino acids is/are

• A

  ACU - Leu; UUA - Thr; ACU - Tyr
• Correct answer
  B

  CUU - Leu; ACA - Thr; UAC - Tyr
• C

  UAC - Leu; CUU - Thr; ACU - Tyr
• Correct answer
  D

  UUA - Leu; ACU - Thr; UAC - Tyr

Hence, the correct answer is options: 'B', 'D'.