Z Under the Influence of Madness, Attempts to Kill A a Hits

Multiple Choice

Z under the influence of madness, attempts to kill A. A hits Z with an iron rod seriously injuring him. In this context which one of the following propositions is correct?

A) A has not right of private defence since Z is mad
B) A has right of private defence though Z is mad
C) A is guilty of inflicting grievous hurt on Z
D) A is guilty of inflicting simple hurt on Z.