Given below are two statements:
Statement $I$: $A$ protein is imagined as a line,the left end represented by the first amino acid ($N$-terminal) and the right end represented by the last amino acid ($C$-terminal).
Statement $II$: Adult human haemoglobin consists of $4$ subunits (two subunits of $\alpha$ type and two subunits of $\beta$ type).
In the light of the above statements,choose the correct answer from the options given below:

• A
  Statement $I$ is false but Statement $II$ is true.
• B
  Both Statement $I$ and Statement $II$ are true.
• C
  Both Statement $I$ and Statement $II$ are false.
• D
  Statement $I$ is true but Statement $II$ is false.