Which of the following statements about the striated muscles is incorrect? (i) In the centre of each I-band, is an elastic fibre (Z-line) which bisects it. (ii) Thin filaments are firmly attached to the Z-line. (iii) M-line is a fibrous membrane in the middle of A-bands. (iv) A sarcomere comprises one full A-bands and 2 half I-bands.

• A. All of these     
• B.                    Only (iv)
• C. (i) and (ii)      
• D.                    None of these