Pat Goss Is a 16-Year-Old Who Was in a Motor

Pat Goss is a 16-year-old who was in a motor vehicle accident. She has several limb fractures, which have been stabilised, and lacerations, which are infected. She has just come to the ward from ICU and you are assisting the registered nurse with her care. The following six questions relate to her care.
-Pat asks for pain medication. She is permitted 6 mg of methadone hydrochloride. The volume to be drawn up from available stock of 10 mg/ml is

A) 0.2 ml
B) 0.4 ml
C) 0.6 ml
D) 0.8 ml