Answer:
option A
Explanation:
Using continuity equation
A v = constant
[tex]A\ \alpha \ \dfrac{1}{v}[/tex]
from the above expression, we can say that the area is inversely proportional to velocity. When area increases velocity tends to decrease or vice versa.
So, when blood flows from the wider region into the narrow region the blood speed will increase.
Hence, the correct answer is option A
