No objection certificate for appearing in interview

Sir, I am working in a state govt medical college as assistant professor and i have applied for a new job in central govt institute. I had furnished a bond for period of five years as i did my specialisation outside the state for three years and during that period govt had given me salary. I have applied for NOC for appearing in the interview thorgh proper channel to the state govt for appearing in the interview and there are two yeras left for the completion of bond peroid.State govt is not issuing the NOC.My specific queries are. 1. Can the state govt dny the NOC for appearing in the interview? 2.Is it my constitutional right to get job in the higher institute and get NOC as i have applied for the govt sector job only 3.I am ready to resign and pay bond money if govt does not give NOC, In such a senario govt is bound to issue NOC. 4.What if I move to the court of law? and what are the chances go get NOC then. 5.My plea is only give coditional NOC ,if i dont get selected i am fullfilling the bond conditions.