Which processor is the derivative of 80386DX?

The correct answer is: B. 80386SX

The 80386SX is a derivative of the 80386DX microprocessor. It was introduced in 1988 as a lower-cost alternative to the 80386DX. The 80386SX has a 24-bit address bus, compared to the 32-bit address bus of the 80386DX. This means that the 80386SX can only address up to 16MB of memory, compared to the 4GB of memory that the 80386DX can address. The 80386SX also has a slower clock speed than the 80386DX.

The 80386SX was popular in low-end computers of the late 1980s and early 1990s. It was also used in some high-end computers, such as the Apple Macintosh II.

The other options are incorrect for the following reasons:

• Option A: The 80387 is a math coprocessor for the 80386DX. It is not a derivative of the 80386DX.
• Option C: The 80386 DDX is a fictional processor. It does not exist.
• Option D: The 8087 is a math coprocessor for the 8086 microprocessor. It is not a derivative of the 80386DX.