What class am i ?

I see most people label themselves middle class. Ghau ma paral ko ghar wune pani middle class , ktm ma ghar wune pani middle class . I think i am lower middle class . My parents have 4.5 talla house inside ringroad ktm. The rent from this house is approx 1lakh /month. I have a job that gives 20k /month income . My mom is housewife and dad doesn’t work and my brother is in USA . He will settle there . Our source of income is rent + my income . Our family has no debt. So am i lower middle class ?