b
Cis-platin is known as anticancer agent. The formula of cis-platin is \(c i s-\left[P t C l_{2}\left(N H_{3}\right)_{2}\right] .\) Here, the word \(c\) is refers to geometrical isomer of \(\left[P t C l_{2}(N H_3)_{2}\right] .\) It is used as an antitumour agent.