Question

The velocity potential in a two-dimensional flow of an ideal fluid?

1. 2x + 3y                                2. 4x² - 3y²

3. cos (x - y)                            4. tan^-1 (x/y)

Select the correct answer using the codes given below                     

a. 1 and 3                    b. 1 and 4                   

c. 2 and 3                    d. 2 and 4