In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionisation is 0.3. Taking $K_f$ for water as $1.85$, the freezing point of the solution will be nearest to :

Question

( A ) $-0.260^{\circ}C$
( B ) $-0.480^{\circ}C$
( C ) $-0.360^{\circ}C$
( D ) $+0.480^{\circ}C$