Ilmenite and rutile, abundantly available in certain coastal tracts of India, are rich sources of which one of the following?

India possesses significant resources of heavy minerals, primarily located along its coastal regions and in inland placer deposits.

These heavy mineral sands consist of seven key minerals: ilmenite, leucoxene (brown ilmenite), rutile, zircon, sillimanite, garnet, and monazite.

Ilmenite (FeO.TiO2) and rutile (TiO2) are the primary sources of titanium. Titanium dioxide exists in polymorphic forms such as rutile, anatase (octahedrite), and brookite.

These minerals, along with other heavy minerals, are abundant in beach sand deposits extending from the Moti Daman-Umbrat coast (Gujarat) in the west to the Odisha coast in the east.

Hence, option (d) is the correct answer.