a
(a)Cis Isomer of \([Pt{(N{H_3})_2}C{l_2}]\) is used as an anticancer drugs for treating several type of malignant tumours. When it is injected into the blood stream the more reactive \(Cl\) groups are lost so the \(Pt\) atom bonds to a \(N\) atom in guanosine (a part of \( DNA\)) This molecule can bond to two different guanosine units & by bridging between them it upsets the normal reproduction of \( DNA.\)