<prompt> Anticoagulant of choice for prophylaxis of pulmonary thromboembolism is: September 2011Heparan sulfateProtamine sulfateLow molecular weight heparinWarfarin  <response>: Ans. C: Low molecular weight heparin Small fixed doses of heparin are given deep subcutaneously to prevent venous thromboembolism. LMW Heparins are prepared from native heparin. 