With reference to two non-conventional energy sources namely 'coal-bed methane' and 'shale gas', consider the following statements: 1. Coal-bed methane is pure methane gas extracted from coal seams, whereas shale gas is simply a mixture of propane and butane that can be extracted from microparticle sedimentary rocks.2. Coal-bed methane sources are in abundance in India, but so far no shale gas sources have been found. Which of the above pair(s) is/are correctly matched?

• A. न तो 1 और न ही 2
• B. 1 और 2 दोनो
• C. केवल 2
• D. केवल 1