Which abbreviation denotes Megabit?

• A. Megabyte
• B. Megabit
• C. Megahertz
• D. Mbps

Answer: (B)

Distinguishing data size units from data rate units is what this question tests. A megabit is a unit that represents one million bits, used to describe an amount of data. Its common abbreviation is Mb, and it is distinct from data rate terms. The option that names the megabit unit directly aligns with this concept. By contrast, a megabyte refers to bytes (MB), eight times larger than a megabit; megahertz (MHz) is a frequency measurement; and megabits per second (Mbps) denotes a rate, not a single megabit. So the term Megabit is the best fit for denoting that unit.