Choose the meaning of Idiom/Phrase: Amna might scream blue murder, but I feel Fatima should get the promotion since she is better qualified for the job?

Someone has been murdered with some blue liquid

Someone is being murdered and has become blue

Suffer from persecution complex

Make a great deal of noise and object vehemently

The correct answer is: Make a great deal of noise and object vehemently.
The phrase "scream blue murder" is an idiomatic expression that means to complain or protest very loudly and vehemently, often in an exaggerated or melodramatic way.
It does not literally mean that someone has been murdered or is being harmed.