MCQ
Among the following essential amino acid is:
- AAlanine
- ✓Valine
- CProline
- DSerine

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$CoCl_3 \cdot 6NH_3, CoCl_3 \cdot 5NH_3,CoCl_3\cdot 4NH_3$ respectively is
[Given : $\mathrm{K}_{\mathrm{f}}=1.86 \,\mathrm{~K} \,\mathrm{~kg} \,\mathrm{~mol}^{-1} ;$ Density of water $=$ $1.00 \,\mathrm{~g}\, \mathrm{~cm}^{-3} ;$ Freezing point of water $\left.=273.15\, \mathrm{~K}\right]$
