b and c are siblings. m has two children and he is son of e, who is father-in-law of h. h has only one son. c is not granddaughter of e.

Let's analyze the family relationships step-by-step based on the information provided:

Given Information:

1. b and c are siblings.
   • b and c share the same parents.
2. m has two children and he is the son of e.
   • m is the child of e.
   • m has two children.
3. e is the father-in-law of h.
   • h is married to e’s child (which is m, since m is e’s son).
   • So, h is married to m.
4. h has only one son.
5. c is not the granddaughter of e.
   • c is not a granddaughter of e, meaning c is not a female grandchild of e.

Constructing the Family Tree:

• e (grandparent, father-in-law of h)
  • m (son of e, married to h)
    • m has two children: b and c (siblings)
    • h has only one son (which must be one of m’s children)

Since b and c are siblings and m has two children, b and c are m’s children. Because h has only one son, and b and c are siblings, only one of them can be male (son), and the other must be female (daughter). Also, c is not the granddaughter of e , so c cannot be the granddaughter. Since c is a child of m (who is e’s son), c is a grandchild of e. The only way for c not to be a granddaughter is if c is male (grandson).

Summary:

• e (grandfather)
  • m (son of e, married to h)
    • b (child of m and h)
    • c (child of m and h)
• b and c are siblings.
• h has only one son, so either b or c is male (son), and the other is female (daughter).
• c is not a granddaughter, so c is the grandson (male).

If you want, I can help you draw this family tree or answer any specific questions about it!