Given below are two statements.

Statement I : The resting potential of a nerve fibre is maintained by a sodium-potassium pump.

Statement II : Electrical potential difference across depolarised axonal membrane is called resting potential.

In light of the above statements, choose the correct answer from the options given below. 

Statement I is correct but statement II is incorrect.

Statement I is true. The resting potential of a nerve fiber, which is typically around -70 millivolts (mV), is indeed maintained by the sodium-potassium pump. The sodium-potassium pump actively transports sodium ions out of the cell and potassium ions into the cell, contributing to the establishment and maintenance of the resting membrane potential.
Statement II is false. The electrical potential difference across a depolarised axonal membrane is not called resting potential, but it is action potential. Resting potential refers to the membrane potential of a neuron when it is in a resting, polarised state, meaning it has not been stimulated and is not actively transmitting a signal. Depolarisation, on the other hand, refers to a decrease in the membrane potential, often leading to the generation of an action potential.