Q: Which one of the following pairs of principal chemical constituents in water and their source is correct?
(a)Ca : Amphiboles, Feldspars, Gypsum
(b)NO3 : Apatite, Fluorite, Mica
(c)CO3 : Feldspars, Clay minerals
(d)F : Dolomite, Gypsum, Anhydrite
Correct Answer: (a)
The correct answer is (b): NO3 : Apatite, Fluorite, Mica. Subject: Geography | Sub-topic: Economic & Mineral Geography Note: This answer was determined through AI-based research. Verify against the official answer key when available.