What is the incompressibility condition in Navier-Stokes equation?

1.	What is the incompressibility condition in Navier-Stokes equation?
A.	‚Äö√Ñ√∂‚àö‚Ä†‚àö¬∞.u=0
B.	‚Äö√Ñ√∂‚àö‚Ä†‚àö¬∞.u>0
C.	‚Äö√Ñ√∂‚àö‚Ä†‚àö¬∞.u<0
D.	‚Äö√Ñ√∂‚àö‚Ä†‚àö¬∞.u=1
Answer» B. ‚Äö√Ñ√∂‚àö‚Ä†‚àö¬∞.u>0

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