Firstly, Sir, as you have stated that since 1950 the are of 11.27 cent in your possession.
Secondly, and the party A come in 1992 for partition of 18 something cent, which in itself has crossed the limitation period of challenging any allege fact.
Thirdly, you must be having something on all portion of land.
Fourthly, please be in possession, and let the court find out the way to measure in any other appropriate manner.
Fifthly, if they have filed any suit then it’s ok otherwise you file one suit for permanent injunction against them.