Which one of the following is incorrect statement?

مندرجہ ذیل میں سے کون سا بیان غلط ہے؟

Sri Lanka continues to be a unitary system

Tamil leaders want Sri Lanka to become a federal system

Belgium shifted from a unitary to a federal form in 1993

Belgium shifted from a federal from to a unitary form of government in 1993

The incorrect statement is: Belgium shifted from a federal form to a unitary form of government in 1993.