Which is true for two dimensional boundary layer?

1.	Which is true for two dimensional boundary layer?
A.	d u/d x – d v/d y = 1
B.	d u/d x – d v/d y = 0
C.	d u/d x + d v/d y = 1
D.	d u/d x + d v/d y = 0
Answer» E.

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Which is true for two dimensional boundary layer?

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