Is English fluency /Spoken English fluency necessary for B.A./Bcom/BSc/BDS/MBBS/MD/MS/M…

BHMS/DHMS/B.Ed/DEd /Hsc/12th cl students? Why? In which areas communication skills are important? Why even English medium students can't speak English fluently?Is English key to success in the 21st century?What level of communication skill is necessary for getting placement in good companies? What is the meaning of personality development?