Which of the following microcontroller is used in engine management system?

The correct answer is A. MC68HC05.

The MC68HC05 is a 8-bit microcontroller that is used in a variety of applications, including engine management systems. It is a low-power, low-cost microcontroller that is easy to use and program. It has a variety of features that make it ideal for engine management systems, including a 16-bit timer, a 16-bit counter, and a 16-bit PWM module.

The MC68HC11 is a 16-bit microcontroller that is also used in a variety of applications, but it is not as commonly used in engine management systems as the MC68HC05. The Intel 80286 and Intel 8086 are 16-bit microprocessors that are not typically used in engine management systems.

The MC68HC05 is a good choice for engine management systems because it is a low-power, low-cost microcontroller that is easy to use and program. It has a variety of features that make it ideal for engine management systems, including a 16-bit timer, a 16-bit counter, and a 16-bit PWM module.