Thanks Guys..finally I got approval for my wife and baby's visit visa.
@ Mary-vani, the education certificates are not required for visit visa application. Of course they are looking for marriage and baby's birth certificate attestation.
So the requirements as per my experience goes here....
0) Application for Wife & child from the typing center. (don't forget to sign)
1) NOC from Company.
2) Contract Copy.
3) Own Passport copy, Wife's passport copy and child passport copy.
4) Attested Marriage certificate copy.
5) Attested Child's Birth Certificate copy. That's all...
N.B: Separate application and the above set of documents for individuals.