Step 1: Concept
Froth flotation relies on the difference in surface hydrophobicity between minerals and gangue.
Step 2: Meaning
Collecters are added to make specific minerals water-repellent so they attach to air bubbles and float.
Step 3: Analysis
Sulphide minerals (like Galena or Chalcopyrite) are naturally more amenable to floatation than most oxides or carbonates.
Step 4: Conclusion
Sulphide ores are the most common industrial application for the froth flotation process.
Final Answer: (B)