Which of the following coordination complexes is used as an anti-cancer agent?

$A$ blood-red colour is obtained when $Ferric$ $Chloride$ solution reacts with

Which of the following is considered as an anticancer species?

To inhibit the growth of tumours,identify the compounds used from the following:
$(A)$ $EDTA$
$(B)$ Coordination Compounds of $Pt$
$(C)$ $D$-Penicillamine
$(D)$ $Cis-Platin$
Choose the correct answer from the option given below:

Aqueous solution of a metallic nitrate $X$ reacts with $NH_4OH$ to form $Y$,which dissolves in excess $NH_4OH$. The resulting complex is reduced by acetaldehyde to deposit the metal. $X$ and $Y$,respectively,are

The complex $[Cu(H_2O)_4]^{2+}$ absorbs light in the yellow region. What color will it emit as its complementary color?