Certificate

Yes,
The programme is fully accredited by the Indian Nursing Council. The College is under the affiliation of the West Bengal University of Health Sciences with effect from July 2005.

You first need to decide in which area of finance are you keen in pursuing a career. Then based on it, you can explore appropriate courses. Say for example you are keen in pursuing a career in securities/ equity markets then you can pursue a host of courses that are run by BSE / NSE. These courses will give a better understanding of various aspects of equities.

Hello Manikanta,
To know your chances of getting admission at SRKR engineering college, you may use the predictor tool from the link below :
https://www.shiksha.com/b-tech/resources/ap-eamcet-college-predictor

Yes, you can take the Diploma certificate for applying at the Bharat seva samaj. It is a one year Diploma. The eligibility criteria says that the student needs toh have 50 % of aggregate marks in +2.

No issues, you can always post your 12th certificate Xerox to JEE officials and also, try contacting the JEE officials through phone for the best way to send the details.