Match $\textbf{Column X}$ and $\textbf{Column Y}:$

$$\begin{array} {|l|l|} \hline \quad \textbf{Column X} & \qquad \textbf{Column Y} \\\hline \text{(P) Horton equation} & \text{(I) Design of alluvial channel} \\\hline \text{(Q) Penman method} & \text{(II) Maximum flood discharge} \\\hline \text{(R) Chezy’s formula} & \text{(III) Evapotranspiration} \\\hline \text{(S) Lacey’s theory} & \text{(IV) Infiltration} \\\hline \text{(T) Dicken’s formula} & \text{(V) Flow velocity} \\\hline \end{array}$$

Which one of the following combinations is correct?

1. $\text{(P)-(IV), (Q)-(III), (R)-(V), (S)-(I), (T)-(II)}$
2. $\text{(P)-(III), (Q)-(IV), (R)-(V), (S)-(I), (T)-(II)}$
3. $\text{(P)-(IV), (Q)-(III), (R)-(II), (S)-(I), (T)-(V)}$
4. $\text{(P)-(III), (Q)-(IV), (R)-(I), (S)-(V), (T)-(II)}$