Of the following, which does not belong to a nuclear reactor ?

A nuclear reactor is designed to initiate and control a sustained nuclear chain reaction. Its primary components include:

• Reaction Chamber (Core): The central part where nuclear fission occurs.
• Heat Exchanger: Transfers heat from the reactor coolant to water to generate steam.
• Turbine: Driven by the steam produced to generate electricity.

Option C is the correct answer because nuclear power generation is inherently a low-carbon process. Unlike fossil fuel power plants, nuclear reactors do not produce carbon dioxide (CO2) during the fission process. Therefore, a mechanism to reduce CO2 emission is not a component of a nuclear reactor, as there are no such emissions to mitigate within the reactor's operational cycle. Such mechanisms (like Carbon Capture and Storage) are associated with thermal power plants burning coal or gas.