Answer:
c. Staircase
Explanation:
Quantization is defined as the number of values which are continuous or large set of values to a discrete value or it can be an integral multiple of fundamental values. The quantized item means it can not be an arbitrary value.
In the given set of lists, the only staircase can be classified as the quantized item because on the stairs you can be on the first step, second step, third step, so on but you can not be on 1.5 steps or 2.5 steps.
Therefore, the staircase is a quantized item.