Question 11 - Assertion Reasoning Questions (MCQ) - Chapter 6 Class 10 - Life Processes

Assertion (A): In the human heart, there is no mixing  of oxygenated and deoxygenated blood.  

Reason (R): Valves are present in the heart which  allows the movement of blood in one direction  only.  

Answer

• The human heart has 4 different chambers which prevent mixing of oxygenated and deoxygenated blood due to the partition between two sides called septum . 
• Valves are present in the heart to prevent backflow of blood i.e., to allow the movement of blood in one direction only.  

Hence,

• The assertion is True
• The reason is True
• But the reason is not the correct explanation for the assertion.

So, the correct answer is (b).