$(1)$ Like chemical catalysts enzymes reduce the activation energy of bio process $\Rightarrow$ This is correct statement.
$(2)$ Enzymes are polysaccharides $\Rightarrow$ This is incorrect statement because enzymes are protein in nature
$(3)$ Enzymes are very specific for a particular reaction and substrate $\Rightarrow$ This is correct statement.
$(4)$ Enzymes are biocatalyst $\Rightarrow$ This is correct statement.
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$\mathop {\lim }\limits_{{X_A} \to 0} \left ( \frac{P_B^0}{X_B} \right )$ and $\mathop {\lim }\limits_{{X_B} \to 0}\left ( \frac{P_A^0}{X_A} \right )$ are
$(I)$ $\left[ {{{\left( {P{h_3}P} \right)}_2}PdC{l_2}PdC{l_2}} \right]$
$(II)$ $\left[ {NiBrCl\left( {en} \right)} \right]$
$(III)$ $N{a_4}\left[ {Fe{{\left( {CN} \right)}_5}NOS} \right]$
$(IV)$ $Cr{(CO)_3}{\left( {NO} \right)_2}$
$(I)$ - $(II)$ - $(III)$ - $(IV)$