Read the statements regarding muscle proteins.
i. Actin is a thin filament and is made up of two $F$-actins,
ii. The complex protein, tropomyosin is distributed at regular intervals on the troponin
iii. Myosin is a thick filament which is also a polymerized protein
iv. The globular head of meromyosin consists of light meromyosin $(LMM)$