Choose the most appropriate preposition to fill in the blank.
He was appraised ____ his latest achievements on the battlefront.

The correct answer is Option 4.
Appraise means to examine something or someone in order to judge their qualities or success, or needs.
The most suitable option is 'for'.
Ex: The available studies will then be critically appraised for quality.
Other options are incorrect, as they are not fit grammatically.