The question is asking which option does not match correctly. Let`s examine each option:
Option 1: Iron-ore-Kudremukh. Kudremukh is a region in Karnataka, India known for its iron ore deposits. This option is correctly matched.
Option 2: Coal-Singreni. Singreni is a region in Telangana, India known for its coal mines. This option is correctly matched.
Option 3: Manganese-Koraput. Koraput is a region in Odisha, India known for its manganese deposits. This option is incorrectly matched.
Option 4: Copper-Khetri. Khetri is a region in Rajasthan, India known for its copper mines. This option is correctly matched.
Therefore, the correct answer is option 3, as the match between Manganese and Koraput is incorrect.