लोह खनिजाचे खालील चार भागात वर्गीकरण करण्यात आले आहे.
अ.मॅग्नेटाईट व हेमेटाईट
ब.लियोनाईट व सिडेराईट
क. लिग्नाईट व हेमेटाईट
ड. डोलोमाईट व अँथ्रासाईट

The correct answer is Option A (a and b options are correct).

Key Points:
• Official answer key designates Option 1 ('a and b options are correct') as correct.
• The four major types of iron ore based on iron content are Magnetite, Hematite, Limonite (लियोनाईट/लिमोनाईट), and Siderite.
• Therefore, combinations 'a' and 'b' correctly identify iron ores.
• In option 'c' and 'd', Lignite and Anthracite are types of Coal, while Dolomite is a magnesium-calcium carbonate mineral.
• Key Takeaway: Types of Iron Ore: Magnetite, Hematite, Limonite, Siderite. (Coal: Anthracite, Bituminous, Lignite, Peat).