Operating torques in analogue instruments are

The correct answer is C. deflecting, control and damping.

Deflecting torque is the torque that causes the pointer of the instrument to deflect. Control torque is the torque that opposes the deflecting torque and keeps the pointer from oscillating. Damping torque is the torque that dissipates energy and prevents the pointer from overshooting its final position.

Vibration and balancing are not operating torques. Vibration is the oscillation of the pointer about its final position, and balancing is the process of reducing vibration.