A 0.0020 M aqueous solution of an ionic compound Co(NH3)5(NO2)Cl freezes at -0.00732 C . Number of moles of ions which 1 mole of ionic compound produces on being dissolved in water will be : (k f=1.86 C/m ) -

1. A. 1
2. B. 2
3. C. 3
4. D. 4

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