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

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

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

Which of the statements given above is/are correct?

A) 1 only              

B) 2 only

C) Both 1 and 2                 

D) neither 1 nor 2