A 62 year old man presents with acute pleuritic chest pain and shortness of breath. He is haemodynamically stable. His Wells score for pulmonary embolism is low and D dimer is negative. What is the most appropriate next step?AReassure and seek an alternative diagnosisBArrange immediate CT pulmonary angiographyCStart therapeutic anticoagulation and arrange CT pulmonary angiographyDAdmit for observation without further testsERequest a ventilation perfusion scan urgentlyCheck my answer