Dr Hargobind Khorana deduced the code for which of the following amino acids

Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it

$$\begin{gathered} 5\text{'} \underline{ } \mathrm{GAATTC} \underline{ } 3\text{'} \\ 3\text{'} \underline{ } \mathrm{CTTAAG} \underline{ } 5\text{'} \end{gathered}$$

The figure of the lac operon from E. coli is shown below. Each alphabets indicates its components may be used more than once

Which of the following option is correct in which all the alphabets are matched with their functions

In the given figure of the lac operon, an operon for inducible enzymes, Identify components and enzymes

The following figure refers to transcription in prokaryote. Identify $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$