I am in Bangalore. I have doubt with respect to the date of birth, where do I cross check ?

Currently, none of the state governments in India allow online searching of date of birth based on details of the person like name, age, father's name etc.

Few of the State Governments in India allows searching of the birth records based on Date of Birth, Gender and Mother’s Name as shown below. In these cases, Date of birth is an important factor to search the birth records.

There is a BBMP web page to submit birth certificate request form. I am not sure whether it will work or not. But you can give a try.

http://1113.sasbbmp.com/birthcertificate/