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Your answer is C Ammonia.

Ammonia is a liquid fuel used in rocket engines.

What is fuel?

  • The substances which on burning produce heat energy are termed as fuels.

Why ammonia is a good fuel?

  • Ammonia (NH3) molecules contain one part nitrogen, and three parts hydrogen. NH3 is a promising and environmentally friendly fuel source because it is carbon free, it contains  more hydrogen atoms than liquid hydrogen (H2).
  • It can be used as a fuel for combustion systems without requiring any  hydrogen extraction process.

Learn more about fuels here..

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