To the system,
`LaCl_(3)(s)+H_(2)O(g) hArr LaClO(s)+2HCL(g)-"Heat"` already at equilibrium, more water vapour is added without altering temperature or volume of the system. When equilibrium is re-established, the pressure of water vapour is doubled. The pressure of `HCl` present in the system increases by a factor of

Options

A. 2
B. `2^(1//2)`
C. 3
D. 4

Answer

B