Consider the following statements:

A. Antigen A and antibody 'a', Antigen 'B' and antibody 'b' cannot live together.

B. Blood group 'O' is called Universal Donor.

C. Blood group 'AB' is called Universal Receptor.

D. At the time of Blood transfusion, RH-factor is also tested.

E. The main function of blood platelets is to protect the body from disease.

Choose the most appropriate answer from the options given below:

Question

Consider the following statements:

A. Antigen A and antibody 'a', Antigen 'B' and antibody 'b' cannot live together.

B. Blood group 'O' is called Universal Donor.

C. Blood group 'AB' is called Universal Receptor.

D. At the time of Blood transfusion, RH-factor is also tested.

E. The main function of blood platelets is to protect the body from disease.

Choose the most appropriate answer from the options given below:

Accepted Answer

#### Step 1: Analyze Each Statement
1. **Statement A:**  
   *Antigen A and antibody 'a', Antigen 'B' and antibody 'b' cannot live together.*  
   - This is **true**, as the presence of corresponding antigens and antibodies in the same blood leads to agglutination (clumping), which is harmful.

2. **Statement B:**  
   *Blood group 'O' is called Universal Donor.*  
   - This is **true**, as blood group O lacks antigens on red blood cells, making it compatible with all other blood groups for transfusion.

3. **Statement C:**  
   *Blood group 'AB' is called Universal Receptor.*  
   - This is **true**, as blood group AB has no antibodies in plasma to react with antigens from other blood groups.

4. **Statement D:**  
   *At the time of Blood transfusion, RH-factor is also tested.*  
   - This is **true**, as RH compatibility is crucial during transfusions to prevent hemolytic reactions.

5. **Statement E:**  
   *The main function of blood platelets is to protect the body from disease.*  
   - This is **false**, as the primary function of platelets is to aid in blood clotting, not directly protecting against diseases.

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#### Step 2: Correct Option
The correct set of true statements is **A, B, C, and D only**.

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Thus, the correct answer is **(b) A, B, C, and D only**.

Answer

Answer

Answer