French phrase
Non merci, aucune option.
Meaning
No, thank you, there is no alternative.
When to use it
A polite refusal that rules out any alternative. It suits brief, somewhat formal exchanges.
Example dialogue
Est-ce que je peux vous proposer une autre solution ?
May I suggest another solution?
Non merci, aucune option. Je vais suivre la procédure normale.
No, thank you, there is no alternative. I will follow the normal procedure.