A
Kerosene and dinitrogen tetroxide
B
Solid aluminum powder and ammonium perchlorate
C
Liquid methane as fuel and liquid oxygen as oxidiser
D
Liquid hydrogen and liquid fluorine
Correct answer: (c) Liquid methane as fuel and liquid oxygen as oxidiser
Explanation
Option C is correct because Methalox specifically designates a rocket propellant combination using liquid methane as fuel and liquid oxygen as oxidiser. Options A, C, and D describe alternative chemical propellants not associated with this definition.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.