The correct option is A Both a and b
There are various limitations of computer system i.e. lack of commonsense, zero IQ, lack of decision-making.
Lack of commonsense: Computer systems as on the date do not possess any commonsense because no full-proof algorithm has been designed to programme commonsense. Since computers work according to a stored programme(s).
Zero IQ: Computers are dumb devices with zero intelligence quotient (IQ). They cannot visualize and thinking what exactly to do under a particular situation, unless they have been programmed to tackle that situation. Computers must be directed to perform each and every action.
Lack of decision-making: Decision-making is a complex process involving information, knowledge, intelligence, wisdom and ability to judge. Computers cannot take decisions on their own because they do not possess all essential of decision-making. They can be programmed to take such decisions, which are purely procedure-oriented.