The correct answer is: C. interception, conduction and dissipation.
The three main requirements for the protection of power station buildings against direct strokes are:
- Interception: The lightning conductor must intercept the lightning strike and divert it to the ground.
- Conduction: The lightning conductor must conduct the lightning current safely to the ground.
- Dissipation: The lightning conductor must dissipate the lightning energy into the ground.
Option A, interception, is only one of the three requirements. Option B, interception and conduction, is correct, but it does not include the third requirement, dissipation. Option C, interception, conduction and dissipation, is the correct answer. Option D, interception, conduction, dissipation and reflection, is incorrect because reflection is not a requirement for the protection of power station buildings against direct strokes. Option E, none of the above, is incorrect because interception, conduction and dissipation are all requirements for the protection of power station buildings against direct strokes.