Bill Takes Some Tablets Which Usually Have a Sedative Effect

Bill takes some tablets which usually have a sedative effect but they actually cause Bill to become violent and he attacks his girlfriend whilst in an intoxicated state. Which of the following statements is true?

A) Bill was voluntarily intoxicated and has a defence to any charge
B) Bill may use evidence of his voluntary intoxication to negate the mens rea for a specific intent offence
C) Bill may use evidence of his voluntary intoxication to negate the mens rea for a basic intent offence
D) Bill was involuntarily intoxicated and has a defence to any charge provided the mens rea is not proved