Blood relations — How is P related to J? Statements: I. M is the brother of P; T is the sister of P. II. P's mother is married to J's husband, who has one son and two daughters.

Introduction / Context:
We must find P's relation to J from partial family information that allows multiple consistent family trees.

Given Data / Assumptions:

• I: Sibling facts about P (one brother, one sister mentioned), but nothing about J.
• II: 'P's mother is married to J's husband' implies J's husband is P's father; however, it does not tell whether J is the same person as P's mother (monogamy) or a different spouse (making J a stepmother). Children counts do not disambiguate identities.

Concept / Approach:
Enumerate models consistent with both statements and observe whether P→J is unique (mother vs stepmother vs other).

Step-by-Step Solution:

Verification / Alternative check:
Sibling info (I) is compatible with either model; the 'one son and two daughters' clause does not resolve J's identity.

Why Other Options Are Wrong:

• A/B/C/E: No single statement or their combination pins a unique relationship.

Common Pitfalls:
Assuming spouses are unique without explicit mention; ignoring step-relations.

Final Answer:
D — Together not sufficient.