Parents forcing me to marry

1.  Take the help of elder relatives who are sympathetic to you to solve the problem.

2.  give assurance to parents that till you complete your studies you will not emotionally involve with any one, particularly with that person with whom you are attached.

3. If both cannot work, you are entitled to file a complaint in the police station for unreasonable restraint of your person or can move the civil court for appropriate remedy.  You can also file domestic violence case, but I caution you that whatever case you file or complaint you give in police station, your relations with your parents turn from worse to worst. 

very right advise above,

if they kicked u dont wrry about relations turning worse take regal recourse.

Dear

your parents has a fear that you will marry to said elder girl. So they locked you.

satify him with poliety that you will do marriage with only their concent only.

my advice that if you try your parents will understand you. don't think to file FIR against your parents. Thay will not hurt you.

they are in fear so they are doing this act.

You are not a child you are a mojor. How can your parents marry you without your permission. strictly deny.