Multiple choice general knowledge If Johns mom has 5 sons and their names are Ja, Je, Ji, and Jo. Who is the last one Jo Je Ja John Reveal answer Fill a bubble to check yourself D Correct answer Explanation If John's mom has 5 sons with names Ja, Je, Ji, and Jo, the last one must be John himself. The pattern lists sons, so John completes the set. This is a logic puzzle about self-reference.