Multiple choice general knowledge math & puzzles

I am looking at somebody's photo. Who is it I am looking at, if I don't have any brothers or sisters and the father of the man in the photo is the son of my father?

  1. Uncle

  2. Son

  3. Father himself

  4. Grandfather

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If I have no siblings, 'my father's son' must be me. Therefore, the father of the man in the photo is me. This means the man in the photo is my son.