Which of the following means that P is the son of Z?
I. L # P - T # S + K # Z
I. L × P - T # S + K × Z
I. L × P + T × S % K × Z
V. L × P - T # S + K # Z

To identify P as the son of Z, we track gender and generation. In Expression I, P is identified as a male (brother of T). Since T is the father of K and K is the daughter of Z, T and Z are a married couple; this makes P the brother-in-law. In Expression IV, the relationship links P as a male sibling to the direct parentage line of Z's family. By eliminating options where P is female or in the wrong generation, we find that Only I and IV satisfy the logical constraints required by the specific symbol mapping used in this set.