Arrange the Following Tasks Involved in Delivering a Dose of Radiation

Arrange the following tasks involved in delivering a dose of radiation therapy in the proper order. I.Complete treatment record
II.Initiate beam-on setting and monitor the patient and equipment
III.Align the field using lasers,light field,and surface landmarks
IV.Prepare the room

A) I,II,III,IV
B) II,I,III,IV
C) IV,II,I,III
D) IV,III,II,I