Central Board Of Secondary Education [CBSE] — mistake letter has been sent

Sir my self dushyant singh singh bhati.
1.I have applied for re-evaluation of subject code 101.
2. Present status is -mistake letter has been sent.
3. My roll no. Is 3131365.
4 application no. Is g40068r.
Class 10. Academic year 2018-19
school-kv ongc sibsagar assam.
I want to know -
1.Whome the letter has been sent to my address or to school.
2.In how many days letter will be received.
3.Is there any e- mail will be sent.
4.How to rectify marksheet