Discussion
Assertion (A) : Blood flows more slowly than water.
Reason (R) : Blood is more viscous than water.
Codes :
Answer: A
Both statements are correct. Blood flows more slowly than water because blood is more viscous, since it contains cells and proteins that increase internal friction.
The viscosity is the cause of the slower flow, so the reason supports the assertion. The options that call one or both incorrect contradict the physics of fluids.
The viscosity of blood is roughly three to four times that of water.
Viscosity is the property of a fluid that resists flow.
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