Which controller is specially developed for interfacing keyboard and display devices for the Intel 8085?

Correct option is A

the Intel 8279 is a dedicated keyboard/display controller specifically designed to handle keyboard scanning, debouncing, encoding, and multiplexed display driving for microprocessors like the 8085 and 8086, simplifying interfacing by managing these complex tasks, notes Testbook, TutorialsPoint, and IDC-Online.