we are three brother residing in mothers property two floors constructed , but i dont want to stay there , the option is for two person only , my brother not allowing to vacate the position , am also residing outside what to do, can my mother force him to vacate the house or she forcely lock that flat

In this situation, if your mother is the legal owner of the property and you have not been given any right to reside there, she has the right to ask your brother to vacate the property. If your brother refuses to vacate the property despite your mother's request, she can take legal action to evict him.

Your mother can serve a legal notice to your brother asking him to vacate the property within a specified time frame. If he still does not vacate the property, your mother can file a suit for eviction in the appropriate court. The court will hear both parties and can pass an eviction order if it deems fit.

If your brother continues to refuse to vacate the property even after an eviction order is passed, your mother can seek assistance from the local authorities to enforce the court's order. It is important to follow the legal process and not take any self-help measures such as forcefully locking the flat, as it could lead to further legal complications.

It is advisable to consult with a local lawyer who specializes in property and real estate laws to guide you through the legal process and help you resolve this matter effectively.