India's coal is approximately A percentage of World's coal reserve. A is given by

Answer: Option C

India’s share of global proved coal reserves is commonly rounded to about 8% in standard mining-geology references and competitive exams.

While modern statistical reviews may report figures in the ~9–10% range depending on the year and methodology, exam keys traditionally accept 8% as the representative value.

This also aligns with India’s position among the top coal-reserve holders globally (after the U.S., Russia, Australia, and China), supporting the choice of Option C.