Let's analyze the information step-by-step:
- b is the father of q.
- So, b → father of q
- b has only two children.
- b has exactly two children.
- q is the brother of r.
- q and r are siblings (brothers/sisters), and q is male.
- r is the daughter of p.
- r is female and child of p.
- a is the granddaughter of p.
- a is female, and p is her grandparent.
- s is the father of a.
- s → father of a.
Step-by-step deduction:
- Since r is the daughter of p, and q is r's brother, q is also a child of p.
- b is the father of q and has only two children: q and r.
- Therefore, b is the father of both q and r.
- Since r is the daughter of p, and b is the father of r, p must be the mother of r (and q).
- So, p and b are the parents of q and r.
- a is the granddaughter of p, and s is the father of a.
- Since a is the granddaughter of p, and s is the father of a, s must be the son of p or the son-in-law of p.
- But since b and p are parents of q and r, and a is the granddaughter of p, a must be the child of either q or r.
- Since a is the granddaughter of p, and s is the father of a, s must be married to either q or r.
- q is male, r is female.
- s is the father of a, so s is the husband of either q or r.
- Since q is male, s cannot be q's husband.
- Therefore, s is the husband of r (female child of p and b).
- So, s is the son-in-law of p.
- q is the brother of r.
- s is the husband of r.
- Therefore, s is the brother-in-law of q.
Final answer:
s is the brother-in-law of q.
