This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Anesthesia, Subject name: Anaesthesia
Safest anesthetic agent in porphyria patient is? 
Select and explain. 
A. Pentazocine, B. Etomidate, C. Propofol, D. Thiopentone
C: Propofol
Answer: C: Propofol 
Explanation: Ans. is 'c' i.e., Propofol Anesthetics in porphyriaSafeUnsafe (should not be used)* Propofol* Benzodiazepines* Opioids (other than pentazocine)- morphine, codeine, pethidine, fentanyl, alfentanyl, naloxone* Lidocaine, Bupivacaine* Muscle relaxants* Neostagmine, atropine, glycopyrrolate* Aspirin, indomethacin, naproxen* Halothane, N2O, isoflurane* Barbiturate (thiopentone)* Etomidate* Pentazocine* Ropivacaine