Each myofibril has alternate dark and light bands on it. The light bands contain ______ and is called ___________________ (C), whereas the dark band called ________________________ (B) contains _______________ .

Question

( a ) actin, I-band or Isotropic band; ‘A’ or Anisotropic band, tropomyosin
( b ) myosin, H-zone; ‘A’ band, actin
( c ) actin, I-band or Isotropic band; ‘A’ or Anisotropic band, myosin
( d ) actin, Z line; ‘A’ or Anisotropic band, myosin