Mr 'X' shows three photographs to Mr Y. Pointing towards photograph 1, he says, ''The person in photograph 1 is my uncle, who says 'uncle' to the person in photograph 2, and the person in photograph 3 is called 'uncle' by the person in photograph 2. '' How is Mr 'X' related to the person in photograph 2 ?
1) Grandson
2) Granddaughter
3) Great Grandson
4) Either 1 or 2
5) None of these

Explanation

5, None of these