A + B means A is the daughter of B; A - B means A is the husband of B; A x B…

Concept: In coded blood-relation puzzles, each connecting symbol (+, -, x, etc.) stands for exactly one fixed relationship between the two letters it joins. A chained code such as "P x Q - R" is decoded link by link, and the two individual relationships are then combined through the shared letter to find the single relationship between the two end letters.

Applying this to the given chain:

1. Decode the first link: "P x Q" means P is the brother of Q.

2. Decode the second link: "Q - R" means Q is the husband of R (so R is Q's wife).

3. Combine the two links through the common letter Q: P is Q's brother, and Q is R's husband, so P is R's husband's brother.

4. A husband's brother is a specific relationship ("brother-in-law") that is not one of the three specific relationships listed among the options.

Cross-check: test each of the three specific relationships offered against the decoded chain — P is not R's son-in-law (no marriage code or daughter-link connects P to R), P is not R's brother (P and R share no direct sibling code; their only connection is through Q's marriage), and R is not P's wife (the husband code links Q to R, not P to R). All three specific relationships fail, so the coded relation between P and R falls outside the listed options.

So the relation P x Q - R shows a relationship between P and R that is not among the given options — none of these.