If z^3+(3+2i)z+(-1+i a)=0 has one real r...

If `z^3+(3+2i)z+(-1+i a)=0` has one real root, then the value of `a` lies in the interval `(a in R)` a.`(-2,1)` b. `(-1,0)` c. `(0,1)` d. `(-2,3)`

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