Analogy — Identify the ore relationship: Aluminium : Bauxite :: Iron : ? Select the ore that stands to Iron as Bauxite stands to Aluminium.

Introduction / Context:
In this analogy, the first pair links a metal to one of its principal ores: Aluminium is obtained from Bauxite. We must choose the iron ore that parallels this metal→ore relationship.

Given Data / Assumptions:

• Bauxite is a primary ore of aluminium.
• Common iron ores include Haematite and Magnetite; Pyrite (iron pyrites) is not a principal commercial iron ore due to sulfur content.
• “Pynolosite” appears to be a misspelling; Manganese ore is “Pyrolusite”. We apply the Recovery-First Policy to treat it as a distractor.

Concept / Approach:
Maintain the “metal : principal ore” mapping. For iron, “Haematite” (Fe2O3) is a canonical commercial ore, widely referenced in examinations.

Step-by-Step Solution:

Verification / Alternative check:
Iron’s principal ores in textbooks: Haematite, Magnetite; of the given choices, only Haematite qualifies.

Why Other Options Are Wrong:

• Pyrite: Sulfide mineral; not a commercial iron ore.
• Magnesite: Magnesium ore/mineral, unrelated to iron.
• Pynolosite (Pyrolusite): Manganese ore; not iron.
• None of these: Incorrect since Haematite is valid.

Common Pitfalls:
Choosing Pyrite because it contains iron; the presence of sulfur prevents its use as a principal iron ore.

Final Answer:
Haematite