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(A) According to Werner's theory of coordination compounds:$1$. Metal atoms exhibit two types of valencies: primary and secondary.$2$. Primary valenci

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$(a), (b)$ and $(c)$ are correct

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(A) According to Werner's theory of coordination compounds:$1$. Metal atoms exhibit two types of valencies: primary and secondary.$2$. Primary valencies are ionisable and are satisfied by negative ions.$3$. Secondary valencies are non-ionisable,fixed in number,and are satisfied by ligands (neutral or negative) connected to the metal ion by coordinate bonds.$4$. Secondary valencies have specific directional properties,which determine the geometry of the coordination complex.Therefore,all three statements $(a), (b),$ and $(c)$ are correct.

Consider the following statements according to Werner's theory:
$(a)$ Ligands are connected to the metal ions by coordinate bonds.
$(b)$ Secondary valencies have directional properties.
$(c)$ Secondary valencies are non-ionisable.
Of these statements:

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Consider the following statements according to Werner's theory:$(a)$ Ligands are connected to the metal ions by coordinate bonds.$(b)$ Secondary valencies have directional properties.$(c)$ Secondary valencies are non-ionisable.Of these statements: