Ans: A. Doctor is guilty under "Last clear chance" doctrine(Ref Reddy 34/e p38, 33/e p40)Last Clear Chance Doctrine:Possibility of doctor saving the patient (plaintiff) by dressing wound properly the 2nd time, hence curing without osteomyelitis development.Hence, doctor is paly guilty for the outcome (osteomyelitis).Criteria included:Failure of doctor to prevent damage resulting from negligent act of patient, even after getting clear time, he cannot plead contributory negligence in civil cases.Elements of proof:Defendant- Doctor.Defendant recognized the danger & acquired a duty to avoid it.Defendant failed to avoid danger.Plaintiff - Patient.Plaintiff placed themselves in a situation of risk or danger through their own negligence.Plaintiff could not avoid the danger.Plaintiff was injured as a result of the defendant's failure.