“A” under the influence of unsoundness attempts to kill “B”. “B” in attempting to defend himself caused grievous hurt to “A”. Here:
1
“A” is liable for attempt to murder and “B” is liable for causing hurt
2
“A” commits no offence and “B” is liable for grievous hurt
3
“B” commits no offence and “A” is liable for an attempt to murder
4
Both “A” and “B” are excused from liability.