The correct choice is (d) MΔ+K^11Δ+K^12P=F^1

The explanation is: The equation MΔ+K^11Δ+K^12P=F^1 gives the vector form of the finite element model of momentum and continuity equations in the flow domain, where F is force matrix, M is a mass matrix, K^11is related to velocity term, K^12 is related to the pressure term, P is the pressure matrix, and Δ is the velocity matrix.