6125. For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by

∂u/∂x = 0
∂(ρu)/∂x = 0
∂u/∂x = – ∂ρ/∂t
∂ρ/∂t = 0
✅ The correct answer is option A.

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