The correct option is
A Achievements
A synonym is a word or a phrase that is similar in meaning to another word/phrase.
Option A: 'Accomplishments' means 'something that has been achieved successfully'.
'Achievements' means 'things done successfully with effort, skill and courage'.
You can see that 'achievement' means the same as 'accomplishment'.
Both mean 'doing things successfully'. Hence, option A is correct.
Option B: 'Acquaintances' means 'knowledge or experience of something'.
Option C: 'Qualifications' means 'the pass of an examination of an official completion of a course'. It does not exactly mean the same as 'accomplishments'. 'Qualifications' are limited to education, even though they are an accomplishment in itself. But it cannot replace the word as an accomplishment may not be restricted to a qualification.
Option D: 'Applications' means 'a written or spoken request or appeal for employment, admission or help'.
These words do not mean the same as 'accomplishments'.
Hence, options B, C and D are wrong.