Which of the following Iron ores is mined at Bailadila?

The correct answer is Hematite.Hematite: Hematite is one of the most abundant minerals on Earth's surface and in the shallow crust.It is an iron oxide with a chemical composition of Fe2O3.It is a common rock-forming mineral found in sedimentary, metamorphic, and igneous rocks at locations throughout the world.Hematite is the most important ore of iron.The most important deposits of hematite are sedimentary in origin.The world’s largest production (nearly 75 million tons of hematite annually) comes from a sedimentary deposit in the Lake Superior district in North America.Other important deposits include those at Minas Gerais, Brazil (where the hematite occurs in metamorphosed sediments); Cerro Bolívar, Venezuela; and Labrador and Quebec, Canada.Hematite is found as an accessory mineral in many igneous rocks; commonly as a weathering product of siderite, magnetite, and other iron minerals; and almost universally as a pigmenting agent of sedimentary and other rocks.​Major Iron Mines in India:Bailadila Iron Ore - ChhattisgarhDalli Rajhara - ChhattisgarhVyasanakere Mines - KarnatakaMayurbhanj - OdishaRatnagiri - MaharashtraGua - Jharkhand Iron ores and their Formulas:Iron oresFormulasHematiteFe2O3SideriteFeCO3LimoniteFeO(OH)·nH2OMagnetiteFe3O4Siderite:Siderite, also called chalybite, iron carbonate (FeCO3), a widespread mineral that is an ore of iron.The mineral commonly occurs in thin beds with shales, clay, or coal seams (as sedimentary deposits) and in hydrothermal metallic veins (as gangue, or WASTE rock).Manganese (Mn), magnesium (MG), and calcium generally substitute in part for iron; siderite forms a complete solid-solution (chemical replacement) series with magnesite (MgCO3), another with rhodochrosite (MnCO3), and an incomplete one with ferroan calcite.LIMONITE:Limonite, one of the major iron minerals, hydrated ferric oxide (FeO(OH)·nH2O).It was originally considered one of a series of such oxides.The name limonite properly should be RESTRICTED to impure hydrated iron oxide (with variable water content) that is colloidal, or amorphous, in character.Often brown and earthy, it is formed by alteration of other iron minerals.It probably bears the same relationship to iron oxides that wad and gummite DUE to manganese and uranium oxides.Magnetite:Magnetite, also called lodestone, or magnetic iron ore, iron oxide mineral (FeFe3O4, or Fe3O4) that is the chief member of one of the series of the spinel group.Minerals in this series form black to brownish, metallic, moderately hard octahedrons and masses in igneous and metamorphic rocks and in granite pegmatites, stony meteorites, and high-temperature sulphide veins.The magnetite series also contains magnesioferrite (magnesium iron oxide, MgFe3O4), franklinite (zinc-iron oxide, ZnFe2O4), jacobsite (manganese iron oxide, MnFe2O4), and trevorite (nickel-iron oxide, NiFe2O4).