Select the correct option to test your answer: A 1 Photo emissive cathode & 2 dynodes B 2 Photo emissive cathodes & 2 dynodes C 2 Photo emissive cathodes & 1 dynode D 1 Photo emissive cathode & 1 dynode Correct Answer: Option A (1 Photo emissive cathode & 2 dynodes) Verified correct option for Electrical Engineering (Electronics And Instrumentation).