Hi Srijana,

To get into Officer's Tranning Academy  (ota) a candidate needs to appear in cds entrance exam. This exam consists of writters(english,maths&gk) as well as ssb interview rounds.

Now, as you are claiming that you had overcome the pleural effusion completely then you are eligible to appear for this post and exam.

But make sure to clear ssb/physical test and also submit a fit - certificate. 

Good luck.