Which of the following terms will replace the question mark (?) in the given series?
$$\text{HMW, INX, JOY, ?}$$

Let us track the progress of each letter position in the consecutive clusters along the series:
1. First letter sequence:

$$\text{H}(8)\to \text{I}(9)\to \text{J}(10)\to \mathbf{K}(11)$$

2. Second letter sequence:

$$\text{M}(13)\to \text{N}(14)\to \text{O}(15)\to \mathbf{P}(16)$$

3. Third letter sequence:

$$\text{W}(23)\to \text{X}(24)\to \text{Y}(25)\to \mathbf{Z}(26)$$

Combining the next predicted letters gives KPZ.