<prompt> Which of the following actions can help in the prevention of HIV transmission?Use of copper T by sex workersUsing safe injection techniquesAvoidance of smoking by driversProbihiting voluntary blood donation  <response>: HIV transmission cannot be prevented by avoidance of smoking by drivers. It can be prevented by using condoms.avoiding indiscriminate sex,screening of blood for HIV 12 before transfusion,using pre-sterilised disposable syringes and needles. Reference:Park;s textbook of preventive and social medicine,K.Park,23rd edition,page no:351. p 