Which anesthetic gas was used by WTG Morton in his experiment?

Which anesthetic gas was used by WTG
Morton in his experiment ?
a) Nitrous oxide
b) Ammonia
c) Diethyl ether
d) Trichloroethylene
Correct Answer - C
Ans. C. Diethyl ether
William Thomas Green Morton, a dentist and medical student at
Boston, after experimenting pon animals, gave a demonstration of
general anesthesia, In 1846.