Explanation:

  VSSC-vikram sarabhai space centre is a major space research centre of ISRO,focusing on rocket and space vehicles for Indias satellite programme it is located in thiruvanathpuram .
    SHAR-Satish dhawan space centre or Sri harikota high altitude range (SHAR)is a rocket launch centre operated by ISRO.located in sriharikota,Andhra Pradesh
    LPSC-liquid propulsion system centre,is a research and development centre functioning under  ISRO,it has two units located at valiamala,in thiruvanantpuram of kerala,and bengaluru of Karnataka.LPSC is augmented by ISRO propulsion complex at mahendragiri of Tamilnadu
    SAC-space application centre is an institution of research in Ahmedabad under  the aegis of ISRO.