X is a non-volatile solute and Y is a volatile solvent. The following vapour pressures are observed by dissolving X in Y.

| X/mol L$^{-1}$ | Y/mm of Hg |
|---|---|
| 0.10 | p$_1$ |
| 0.25 | p$_2$ |
| 0.01 | p$_3$ |

The correct order of vapour pressures is