## **Core Concept**
World Anaesthesia Day is celebrated to commemorate the first successful demonstration of ether anesthesia. This milestone in medical history is attributed to **Crawford Long**, who used diethyl ether for surgical anesthesia.

## **Why the Correct Answer is Right**
The correct answer, **October 16**, marks the day in 1842 when Crawford Long administered diethyl ether to James Venable for a surgical procedure, effectively demonstrating the potential of ether as an anesthetic. This event is a foundational moment in the history of anesthesia.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond with any recognized historical event related to the development of anesthesia.
- **Option B:** Similarly, this option does not align with the historical records of significant events in anesthesia.
- **Option D:** This option is also incorrect as it does not represent the date of the first successful demonstration of ether anesthesia.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **October 16th** is celebrated as World Anaesthesia Day, commemorating the pioneering work of Crawford Long in 1842. This date is significant for its contribution to pain management and surgical practices.

## **Correct Answer:** . **October 16**