I passed 12th in 2004. Can I take admission in B.Sc after the gap of 12 years? Is my graduation valid in government jobs?

Your graduation will be valid but central governments jobs are almost difficult for u. Normally age limit is 25 to 27( if u r not from any reserved category) years for these jobs. Now second option may be ur home state .if local government have raised the age limit then you can apply. So kindly con

Little difficult here because age is also a factor in Govt. Job.