thnk u manish ji, hemant ji, sanjay ji, vishwanth ji
now, i clearly understood what these terms means
FC-non Ac first class
EC-exeuctive class(found only in shatadbdi trains...with 3*2 seating arrangement)
CC-Ac...
more... chair car(with 2*2 seating arrangment)
ACC-Previous name of 1A
Gud night ...sweet dreams....!