Beneficiation of iron ore: among the listed choices, which method is most commonly applied at industrial scale?

Introduction / Context:
Iron ore beneficiation flowsheets vary by ore type, liberation size, and impurities. Gravity, magnetic separation, and sometimes flotation are used.

Concept / Approach:
From the options provided, jigging and tabling are classical, widely used gravity methods for coarse hematite/goethite ores after crushing and screening. While magnetic separation is prevalent in many circuits, it is not listed among the options. Flotation is used mainly for fine slimes and specific gangue removal; flocculation is an auxiliary chemical aid, not a primary beneficiation step.

Final Answer:
Jigging and tabling (gravity concentration)