Computer Basic Information
The data bus in 8080A/8085 microprocessor is a group of

sixteen bidirectional lines that are used for data transfer between the microprocessor and memory
eight bidirectional lines that are used to transfer 8 bits between the microprocessor and its I/O and memory
None of these
eight unidirectional lines that are used for I/O devices
eight lines used to transfer data among the registers

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