The correct answer is C. 32.

The 80386 is a 32-bit microprocessor that was introduced by Intel in 1985. It was the first microprocessor to implement the 32-bit x86 instruction set architecture. The 80386 has a 32-bit data bus and a 32-bit address bus. It also has a 32-bit instruction set. The 80386 has 16 general-purpose registers, each of which is 32 bits wide. It also has a number of special-purpose registers, including the instruction pointer, the program counter, and the status register.

The 80386 was a major step forward in the development of microprocessors. It was the first microprocessor to be widely used in personal computers. The 80386 also paved the way for the development of 64-bit microprocessors.

The following are the four options in the question:

  • A. 8
  • B. 16
  • C. 32
  • D. 64

Option A is incorrect because the 80386 has 32-bit registers.

Option B is incorrect because the 80386 has 32-bit registers.

Option C is correct because the 80386 has 32-bit registers.

Option D is incorrect because the 80386 has 32-bit registers.