Sir my father is high school(1992 batch this time grade pay 5400 and pay scale 9300-34800) teacher in bihar govt, but i don't know which class employee and income annualy 10 lakhs.My mother is house wife. sir also clarify that land criteria
Based on your father's status you belong to OBC Non-Creamy Layer.
For Land criteria, it depends upon Ceiling limits of your state.
Land Ceiling limit for Bihar: http://www.bareactslive.com/BIH/BH403.HTM
I'm mentioning link because there are many sub-categories like irrigated land, dry land etc. Check yours.
If you have more doubts text below.
Sir also clarify that my fathers group/class (status in bihar govt teacher rules)
Sir also clarify that Making process of non creamy layer certificate.
Teachers are never in class 1. Your Father may be in Class 3 or Class 2. Anyhow, both are the same for your case because your mother is not working as a class 2 teacher/officer.
You have to submit your caste certificate, residential certificate(ration card), and your father's salary receipt.