Consider the following varieties of iron ore 1. Haematite 2. Magnetite 3. Limonite 4. Siderite Which of the following is the correct sequence with respect to descending order of quality of the above ores?

• A. 1, 2, 3 and 4    
• B. 2, 3, 4 and 1
• C. 1, 3, 2 and 4    
• D. 1, 3, 4 and 2