Study the information carefully and answer the questions given below.

Eight persons A, B, C, D, E, F, G and H are members of a three-generation family, with no single parent. G is the daughter-in-law of D. B has no daughter. H is the aunt of A. G is the sister-in-law of C. C is married member of the family. B is the grandfather of A. C and A are of opposite gender. E is the brother of F and has no child.

How is G related to E?

Based on the provided information, we can systematically reconstruct the family tree step-by-step:

Step 1: Identify the Generations and Grandparents
- The family consists of eight members spanning three generations with no single parents (meaning every parent in the family has a spouse).
- B is the grandfather of A, which means B is in the first generation (grandparents) and A is in the third generation (grandchild). Since B is the grandfather, B is male.
- G is the daughter-in-law of D. Since D has a daughter-in-law, D must be in the first generation, married to B. Thus, D is the grandmother (female).

Step 2: Determine the Second Generation (Children of B and D)
- B has no daughter, meaning all children of B and D are male.
- E is the brother of F and has no child. This indicates that E and F are brothers (both male) and sons of B and D.
- G is the daughter-in-law of D, so G (female) must be married to one of D's sons. Let us place G as the wife of F. Since they are married, F and G form a parental couple, making them the parents of A.
- H is the aunt of A. Since B has no daughters, A cannot have an aunt who is a direct sister of their father. Thus, the aunt H must be married to a brother of A's father.
- Let this brother be C. C (male) is married to H (female), satisfying the clue that C is a married member of the family.
- G is the sister-in-law of C, which is true because G is married to C's brother, F.
- C and A are of opposite gender. Since C is male, A must be female.

Step 3: Analyze the Family Structure
- First Generation (Grandparents): B (Male) married to D (Female).
- Second Generation (Parents/Uncles/Aunts): F (Male) married to G (Female); C (Male) married to H (Female); E (Male, unmarried with no children).
- Third Generation (Grandchild): A (Female, daughter of F and G).
- This accounts for all 8 members (A, B, C, D, E, F, G, H) with no single parents.

Step 4: Answer the Question
- E and F are brothers.
- G is married to F.
- Therefore, G is the wife of E's brother, which makes G the Sister-in-law of E.