The correct answer is B. GB.
A gigabyte (GB) is a unit of information or computer storage equal to one billion (1,073,741,824) bytes. It is often used to measure the storage capacity of hard drives, flash drives, and other storage devices.
A gigahertz (GHz) is a unit of frequency equal to one billion (1,000,000,000) cycles per second. It is often used to measure the speed of processors and other electronic devices.
A gigawatt (GW) is a unit of power equal to one billion (1,000,000,000) watts. It is often used to measure the power output of power plants and other large electrical generators.
A giganewton (GN) is a unit of force equal to one billion (1,000,000,000) newtons. It is often used to measure the force of large explosions and other powerful forces.