X's mother is the only daughter of Y's paternal grandfather. How is Y's father related to X?

FatherCorrect answerYour answerPaternal uncleCorrect answerYour answerMaternal uncleCorrect answerYour answerGrandfatherCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Y's father is a son of Y's paternal grandfather.
X's mother is that grandfather's daughter, so she and Y's father are sister and brother.
A mother's brother is a maternal uncle.

Worth noting

Paternal uncle is the father's brother. Here the link to X runs through X's mother.

Ten questions from Blood Relations, at your own pace.

Explanation