(a)  Define "dangerous drug" and "authorized seller of poisons" under the Dangerous Drugs Ordinance. Describe the statutory authority for authorized sellers of poisons to manufacture and retail Dangerous Drugs well as the statutory requirements on keeping of register or other records by authorized sellers of poisons under the Dangerous Drugs Regulations. (10 marks) 

(b) Describe the requirements with respect to prescriptions prescribing a dangerous drug. (10 marks)