Synonym of CHIMERICAL

Answer: Option B

Erratic : not even or regular in pattern or movement; unpredictable.
Imaginary : existing only in the imagination; illusory.
Uncertain : not able to be relied on; not known or definite.
Short-lived : lasting only a short time.
Chimerical : hoped for but illusory or impossible to achieve.

Synonym of Chimerical is Imaginary