Q: Tooth enamel of humans is made up of:
(a)Calcium phosphate
(b)Sodium hydrogen carbonate
(c)Sodium hydroxide
(d)Lactic acid
Correct Answer: (a)
The correct answer is (a): कैल्सियम फॉस्फेट. Subject: Science & Technology | Sub-topic: Chemistry Note: This answer was determined through AI-based research. Verify against the official answer key when available.