C34 Chapter 36 know the truth

He asked the doctor whether they could have a kid with type B or not, and he also thought this question was very stupid.

It was, and how'd be possible?

So where did type B come from? Clearly it's not from him.

So, Who were Jason's parents?

He thought that the kid did not look like him at all when he saw him at firs sight, but he was so cute that he liked him