hai..

U can study and get any CERTIFICATE
but
U cannot get ur DEATH CERTIFICATE

U may have Airtel or BSNL connection
but
U when u sneeze u will say HUTCH

U can bcom ENGINEER if u study in ENGINEERING COLLEGE
but
U cannot bcom a PRESIDENT if u study in PRESIDENCY COLLEGE

U can expect a BUS from a BUS STOP
but
U cannot expect a FULL from FULL STOP

A mechanical engineer can bcom a MECHANIC
but
A software engineer cannot bcom a SOFTWARE

U can find TEA in TEA CUP
but
U cannot find world in WORLD CUP

U can find KEYS in KEY BOARD
but
U cannot find MOTHER in MOTHER BOARD