Given below are two statements: Statement I: A protein is imagined as a line, the left end represented by first amino acid (C- terminal) and the right end represented by last amino acid (N-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: