Explanation:

- Option 1: OCTABYTE

This is not a term commonly used in computing. It's likely a made-up term and does not represent any known unit of information.

- Option 2: QUBYTE

This is also not a recognized term. It appears to be an incorrect combination of terms from classical and quantum computing.

- Option 3: GIGABIT

A gigabit is a unit of information in classical computing, equivalent to one billion bits.

- Option 4: QUBIT

The qubit is the basic unit of information in quantum computing. Unlike a bit, which is either 0 or 1, a qubit can exist in superposition, holding both 0 and 1 simultaneously.

- Option 5: BIT

The bit is the basic unit of information in classical computing. It's a binary value—either 0 or 1.