Fine structure of striated muscle fibres has been elucidated with the help of electron microscope. Study
the following statements and choose the incorrect ones:

The dark and light bands of myofibrils have been respectively, named as ‘A’ [Anisotropic under
polarized light] and ‘I’ [Isotropic under polarized light] bands.

The A bands contain about 120 angstrom thick and 18 angstrom long actin filaments.

Each I band is divided into two equal halves by a thin fibrous transverse zig-zag partition called Z band.

The major middle lighter region of A band is called M zone