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Subject :NSO    Class : Class 5

The given diagram represents the circulatory system.

Which arrows represent the blood that is rich in oxygen?

A Y and Z
B W and Y
C X and Z
D W and X

Please explain me the answer....

Ans 1:

Class : Class 8

Ans 2:

Class : Class 6
Ans is A because lungs send oxygen-rich blood to the heart and this oxygen-rich blood is sended to all body parts and the carbondioxide-rich blood goes back to the heart from the body this carbondioxide-rich blood is sended to the lungs.

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