Q: Which one among the following is an example of olfactory indicator?
(a)Litmus
(b)Methyl orange
(c)Phenolphthalein
(d)Onion
Correct Answer: (c)
The correct answer is (c): Phenolphthalein. Subject: General Science | Sub-topic: Chemistry - Acids & Bases Note: This answer was determined through AI-based research. Verify against the official answer key when available.