Which of the following would be the smallest and fastest computer imitating brain working?

Detailed Solution:

The correct answer is “Quantum computer”.

The smallest and fastest computer imitating brain working is most likely: (2) Quantum computer

Quantum computers leverage the principles of quantum mechanics to perform calculations in a fundamentally different way than traditional computers. This allows them to potentially tackle problems that are impossible for classical computers, including simulating complex systems like the brain.