With reference two non-conventional energy sources called ‘coalbed methane’ and ‘shale gas’ consider the following statements:

I. In India, abundant coalbed methane sources exist, but so far no shale gas sources have been found.

II. Coalbed methane is the pure methane gas extracts from coal seams, while shale gas is a mixture of propane and butane only that can be extracted from fine-grained sedimentary rocks.