Column Ishows the Bernoulli's equation in the different forms. Column II lists certain units each of which pertains to one of the possible forms of the equation.

	Column I		Column II
i.	$\frac{{\mathrm{v}}^2}{2\mathrm{g}}+\frac{\mathrm{p}}{\mathrm{\rho g}}+\mathrm{z} = \mathrm{constant}$	p.	Total energy per unit mass
ii.	$\frac{{\mathrm{\rho V}}^2}{2}+\mathrm{P}+\mathrm{\rho } \mathrm{gz} = \mathrm{constant}$	q.	Total energy per unit weight
iii.	$\frac{{\mathrm{V}}^2}{2}+\frac{\mathrm{P}}{\mathrm{\rho }}+\mathrm{gz} = \mathrm{constant}$	r.	Total energy per unit volume

(where z is ratio of height to volume)
Now match the given columns and select the correct option from the codes given below.