Which of the following units of memory of computer is wrongly paired?

Digital storage capacities follow a binary-prefix hierarchy where each larger unit equals 1024 times the unit directly below it: 1 Byte = 8 Bits, 1 Kilobyte (KB) = 1024 Bytes, 1 Megabyte (MB) = 1024 KB, 1 Gigabyte (GB) = 1024 MB, 1 Terabyte (TB) = 1024 GB, and 1 Petabyte (PB) = 1024 TB.

1. 8 bits = 1 byte matches the base definition directly: a byte is defined as a group of 8 bits.

2. 1024 KB = 1 MB matches the hierarchy directly: a megabyte is defined as 1024 kilobytes.

3. 1024 TB = 1 PB matches the hierarchy directly: a petabyte is defined as 1024 terabytes.

4. 1024 bytes sits at the kilobyte level of the hierarchy, since 1 KB = 1024 Bytes, not at the gigabyte level; a gigabyte is instead defined as 1024 megabytes.

As an independent check using powers of two: 1 Byte = 23 bits, 1 KB = 210 bytes, 1 MB = 220 bytes, 1 GB = 230 bytes, 1 TB = 240 bytes, and 1 PB = 250 bytes. So 1024 bytes equals 210 bytes, the kilobyte level, which is twenty powers of two short of the gigabyte level (230 bytes).

The pairing that breaks this hierarchy is 1024 bytes = 1 GB (Gigabyte): 1024 bytes correctly equals 1 KB, not 1 GB.