A 0.001 molal solution of\[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{4}}]\] in water had a freezing point depression of\[0.0054{}^\circ C\]. If \[{{K}_{f}}\] for water is 1.80, the correct formulation for the above molecule is

• A. \[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{3}}]Cl\]
• B. \[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]C{{l}_{2}}\]
• C. \[[Pt{{(N{{H}_{3}})}_{4}}Cl]C{{l}_{3}}\]
• D. \[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{4}}]\]