With reference to Indian history, who among the following is a future Buddha, yet to come to save the world?

Maitreya is considered the future Buddha in Buddhist eschatology, destined to appear on Earth, achieve complete enlightenment, and teach the pure Dharma.

In some Buddhist texts like the Amitabha Sutra and Lotus Sutra, Maitreya is also known as Ajita.

Buddhist tradition states that Maitreya will succeed the current Buddha, Gautama Buddha (also known as Shakyamuni Buddha).

The prophecy of Maitreya's arrival points to a future time when the Dharma will be largely forgotten. Maitreya's millenarian role has also been adopted by non-Buddhist religions, such as the White Lotus, and modern religious movements like Yiguandao.

Therefore, Maitreya is the future Buddha who is yet to come to save the world.

Hence, option c is correct.

Sources:

• Wikipedia - Maitreya