What 32-bit bus architecture was introduced by IBM with their new PS/2 range of personal computers in 1987?

What 32-bit bus architecture was introduced by IBM with their new PS/2 range of personal computers in 1987?

• Peripheral Component Interconnect (PCI)
• Micro Channel (MCA)
• VESA Local Bus (VLB)
• Extended Industry Standard Architecture (EISA) 

EXPLANATION

Micro Channel architecture, or the Micro Channel bus, was a proprietary 16- or 32-bit parallel computer bus introduced by IBM in 1987 which was used on PS/2 and other computers until the mid-1990s.

IBM PC AKA Acorn

The code name for the new computer was "Acorn." Twelve engineers, led by William C. Lowe, assembled in Boca Raton, Florida, to design and build the "Acorn." On August 12, 1981, IBM released their new computer, re-named the IBM PC.