Smooth muscles are Voluntary, spindle-shaped, uninucleate Involuntary, cylindrical, striated Involuntary, fusiform, non-striated Voluntary, multinucleate, cylindrical

Smooth muscles are located in the walls of hollow internal organs and exhibit involuntary contraction. Smooth muscle fibers are spindle-shaped cells, uninucleated and are arranged in parallel lines to form sheets. The absence of light and dark bands make these muscles non-striated. So, the correct answer is 'Involuntary, fusiform, non-striated'