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. |
A) 1 only
B) 2 only
C) Both 1 and 2
D) neither 1 nor 2
Correct Answer: D
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