A

A sonometer wire indeed produces transverse waves.
Step 1: Understand the nature of waves produced. In a sonometer, a wire is stretched and when plucked or struck, the vibrations create waves along its length. These waves are transverse, meaning that the particle displacement is perpendicular to the direction of wave propagation.
Step 2: Identifying stationary waves. In a fixed length of the wire, specific frequencies of vibration result in standing waves, known as stationary waves. These waves do not travel along the wire but oscillate in place, which is a characteristic of stationary waves.
Step 3: Wave Polarization. Although polarization is primarily associated with electromagnetic waves, in a sonometer, we are typically discussing the concept of the superposition of waves. While the term 'polarized' usually refers to the orientation of transverse electromagnetic waves, in this context, it highlights the directional nature of the oscillation of the transverse waves produced in the wire.
Therefore, the statement holds true in the context of the sonometer wire producing transverse, stationary waves.