Which of the following patients are at the highest risk of suffering from an adverse drug reaction? a) An 8 month year old infant receiving a prescription for an antibiotic. b) A 22 year old patient with asthma receiving prescriptions for inhalers to relieve and prevent their asthma. c) A 48 year old patient who has hypertension and receives a prescription for an ACE Inhibitor. d) A 68 year old patient who has oedema receiving a prescription for a diuretic.