A process P$0$ has a precedence vector of $(8,2,4)$ with the sequence $($P$0,$ P$1,$ P$2).$ Whichmessage from P$2$ can be delivered immediately to preserve causal ordering? a$)(8,2,6)$

b$)(9,3,5)$

c$)(4,1,3)$

d$)(1,1,5)$