Question

Which aniline derivative is a commonly used dental local anaesthetic?

• A. Paracetamol
• B. Sulfanilamide
• C. Lidocaine
• D. Aniline hydrochloride

Hint:

Lidocaine is a commonly used local anaesthetic due to its effectiveness and low toxicity.

Answer 1

The Correct Option is C

Step 1: Understanding the question.
Aniline derivatives are often used in medical applications, including local anaesthetics. Among the options, lidocaine is the most commonly used dental local anaesthetic.
Step 2: Conclusion.
Thus, the correct answer is option (C), Lidocaine.

Answer 2

Step 1: Among aniline derivatives, one is very commonly used by dentists to numb the area before treatment.

Step 2: That drug is lidocaine, a widely used local anaesthetic.

Step 3: So the correct answer is lidocaine — option (C).

Answer 3

Elimination approach.
Paracetamol is an aniline derivative too, but it is used as a pain reliever and fever reducer, not as a local anaesthetic.
Sulfanilamide is an aniline-derived sulfa drug used against bacterial infections, again not an anaesthetic.
Aniline hydrochloride is simply a salt of aniline with no established medical use as a drug.
That leaves lidocaine, an amide-type local anaesthetic derived from aniline that dentists routinely inject or apply to numb tissue before a procedure. So the answer is option (C).