The correct answer is A. Induction ammeter.
An induction ammeter is a type of ammeter that measures alternating current (AC). It works by using the principle of electromagnetic induction to create a current in a secondary coil that is proportional to the current in the primary coil. The secondary coil is connected to a meter that measures the current.
A permanent magnet type ammeter is a type of ammeter that measures direct current (DC). It works by using the principle of magnetism to create a current in a coil that is proportional to the current in the circuit. The current in the coil is then measured by a meter.
An electrostatic ammeter is a type of ammeter that measures DC. It works by using the principle of electrostatics to create a current in a coil that is proportional to the current in the circuit. The current in the coil is then measured by a meter.
A moving iron repulsion type voltmeter is a type of voltmeter that measures AC. It works by using the principle of magnetic repulsion to create a current in a coil that is proportional to the voltage in the circuit. The current in the coil is then measured by a meter.
In conclusion, the correct answer is A. Induction ammeter.