Query about PSU company placement

I want to join any PSU (Maharatna and Navaratna companies) company after MBA . This year I am going to appear in both CAT and GMAT as well . Now my question is as my first preference is PSU companies ; what are the b schools in INDIA , from where …

I want to join any PSU (Maharatna and Navaratna companies) company after MBA . This year I am going to appear in both CAT and GMAT as well . Now my question is as my first preference is PSU companies ; what are the b schools in INDIA , from where I will get PSU jobs certainly ?What are the salary packages they offer after MBA ? Will it be beneficial to join PSU s after completing MBA ?What about the work cultures of the managers in PSU ?My career profile :---------------------------upto B.tech I have scored 85 % throughout my career . I am working in India's largest IT company for the past 3.9 years . So what is the score required in CAT and GMAT to fulfill my next career decision ??