This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
In a blood sample antiserum A and antiserum B and Rh +ve factor is added. No agglutination is seen. This is: 
Select and explain. 
A. O group and Rh+ve, B. O group and Rh-ve, C. AB group and Rh+ve, D. AB group and Rh-ve
B: O group and Rh-ve
Answer: B: O group and Rh-ve 
Explanation: None