What is the smallest data size in a computer?

The smallest data size in a computer is indeed 1 Bit. A bit, which stands for binary digit, is the fundamental building block of data in computing. It can represent a value of either 0 or 1, essentially reflecting the most basic state of information in digital systems. This makes it the smallest unit of data that can be processed or stored.

In contrast, a Byte is made up of 8 bits, and thus, while important, it represents a larger unit of data than a single bit. Similarly, a Kilobyte and a Megabyte represent even larger quantities of data, with a Kilobyte consisting of 1024 Bytes and a Megabyte comprising 1024 Kilobytes. Therefore, while all the other options represent valid data sizes, they are inherently larger than a bit, confirming that a bit is the smallest unit in the context of data storage and representation in computing.