Choose the exact meaning of the idiom/phrase.
It is out of the question for one to have a quiet meal with kids around.
a) Unthinkable
b) Imaginable
c) Unbecoming
d) Indecent

Hint: The phrase ‘out of question’ means that something stands no chance or is almost undoubtedly obsolete. For example, “Finding another such artist is out of the question, he is an exceptionally talented artist.”

Complete answer:
Option a ‘unthinkable’ refers to something that is beyond one’s reach of thought, something that one cannot think of. This holds a similar meaning to that of the phrase given above, ‘out of question’. Thus, the option ‘a’ is the correct answer.
Option b ‘imaginable’ is something that one can think of or picture in one’s imagination. For example, “The scenario of Rachel’s wedding was imaginable to each one of us.” This holds a meaning which is opposite to that of the phrase given to us. Thus, option ‘b’ is incorrect.
Option c ‘unbecoming’ is an adjective that refers to something that is unsuitable or inappropriate, especially through being unattractive. This is unrelated to the meaning of the phrase ‘out of question’. Thus, the option ‘c’ is incorrect.
Option ‘d’ indecent’ is an adjective that refers to something or someone that is inappropriate as per the standard of what is right as per the societal norms. This is not related in meaning to that of the given phrase. Thus, option ‘d’ is incorrect.

Note:
‘Out of question’ is an idiom which means something that stands zero possibility of happening.