The correct option is A Cylindrical, multinucleated and unbranched
Striated muscles are skeletal muscles, which appear striated when viewed under the microscope. Their cells are cylindrical, unbranched and are multinucleated (syncytial). These muscles are capable of voluntary, quick, forceful contractions.
Thus, the correct answer is option (A)- 'Cylindrical, multinucleated and unbranched'.