question: Following road traffic accident patient suffers polytrauma and is evaluated in the emergency section of the hospital. His pulse rate is 116, respiratory rate is 24, blood pressure of 122/78 mm of Hg and patient is mildly anxious. What is the approximate blood loss patient has following trauma?
opa: <750 ml
opb: 750 - 1500 ml
opc: 1500 - 2000 ml
opd: >2000 ml