Which of the following statement about coal deposits in India is NOT correct?

Coal occurs in rock sequences mainly of two geological ages, namely Gondwana and tertiary deposits. About 50 percent of the coal deposits in India is of bituminous type and of non-coking grade. Both 1 and 2 None of the above

About 50 percent of the coal deposits in India is of bituminous type and of non-coking grade.

Coal is a one of the important minerals which is mainly used in the generation of thermal power and smelting of iron ore. Coal occurs in rock sequences mainly of two geological ages, namely Gondwana and tertiary deposits. About 80 per cent of the coal deposits in India is of bituminous type and is of non-coking grade.