"Our three blood types?" Xu Nianhua wasn't too surprised, as she was not biologically related to begin with; it was understandable that their blood types were different.
When the nurse heard Xu Nianhua's words, she smiled and asked, "Are you siblings by blood?"
"Yes," Xu Nianji affirmed with a nod.
Xu Nian'an sat there, still pondering over the chart of blood type inheritance.
"If one of your parents is type A and the other is type B, then it's possible for the three of you siblings to be type B, type O, and type AB," the nurse answered earnestly.
Xu Nianji seemed to understand but didn't quite get it.
Upon hearing this, Xu Nian'an had an epiphany and said with certainty, "Right, right, right, that's also a possibility, you scared me for a second there."
Xu Nian'an heaved a huge sigh of relief; when he first saw the three different blood types, he really got a fright. But after the nurse's explanation, he immediately felt at ease.
