Jet engine works on the principle of conservation of what?

Jet engines work on the principle of conservation of linear momentum, which is; option [C]. According to Newton’s third law, for every action, there is an equal and opposite reaction. In a jet engine, fuel combustion generates high-speed exhaust gases expelled backwards, imparting momentum to the engine in the forward direction. This action-reaction pair conserves linear momentum. The engine accelerates forward due to the expulsion of exhaust gases, propelling the aircraft forward. This principle underpins the operation of jet engines, allowing them to generate thrust efficiently for propulsion. While conservation of energy (option A) and mass (option B) are also fundamental principles in physics, they do not directly govern the operation of jet engines. Similarly, conservation of angular momentum (option D) is not relevant to the linear motion of jet engines, which primarily rely on conservation of linear momentum for propulsion.