TNPSC Date of Birth Proof Documents

What are the documents that may be submitted as evidence of date of birth?
i. the Secondary School-Leaving Certificate; or
ii. A certificate from a University or College, or School authority showing data of birth, according to the University or College or School records. (The certificate of Baptism or extract from Register of Births, cannot be accepted); or
iii. Extract from the Service Register showing date of birth in respect of persons holding regular appointment under the State Government.