Select the most appropriate option to fill in the blank.
We’ll accept your application _______ you fulfil all the conditions.

Correct option is A

The correct option to fill in the blank is (a) "provided".
" Provided" is used to introduce a condition. It fits the context of the sentence, implying that acceptance is conditional upon fulfilling all the conditions.
Meanings of other options:
• Provided - On the condition or understanding that.
• So that - Used to introduce a purpose or result.
• Although - Despite the fact that.
• Even if - Regardless of whether.