Question: How many children does M have ?
Statements:
H is the only daughter of X who is wife of M.
K and J are brothers of M.
I alone is sufficient while II alone is not sufficient
II alone is sufficient while I alone is not sufficient
Either I or II is sufficient
Neither I nor II is sufficient
Explanation:
From I, we conclude that H is the only daughter of M. But this does not indicate that M has no son. The information given in II is immaterial.
From I, we conclude that H is the only daughter of M. But this does not indicate that M has no son. The information given in II is immaterial.