MBA/PGDM

Hello Rashmi,
Here are few best college apart from IIM:
1.XLRI -Xavier School of Management
This management institute is ranked no.3 in the list of top management institutions in India. XLRI is also acknowledged as one of the oldest b-schools of the country.
2. Faculty of Management studies (FMS), Delhi
Established in 1954 under the university of Delhi, this B-school in India is ranked 4th in the list of top B-schools of India. FMS offers management education to the professional managers as part-time and full-time MBA programmes.
3. S.P. Jain institute of management and research (SPJIMR), Mumbai
SPJIMR is a constituent of Bharti Vidya Bhavan and is recognized as one of the premier business schools of India. The institute grew from one of the three B-schools in Mumbai in 1981 to one of the top 10 B-schools in the country.
4. Indian Institute of foreign trade, Delhi (IIFT)
The Indian institute of foreign trade was established by the government of India in 1963 to help and improve the foreign trade management of the country. It is the only b-school in the list of top 1 institutes of India that offers Masters in business administration in international business (MBA-IB).

Verbal:
Concepts
SC: Manhattan Sentence Correction Guide
CR: Either Manhattan Critical Reasoning Guide or Powerscore CR Bible
RC: No good book per se. A document titled Gins RC helped me improve my score in this section. So probably a good bet to read this.
Practice
Official Guide
Official Guide Verbal
Quant:
Concepts
Manhattan - Set of 5 books (Even if you already know the concepts, it doesnt hurt to go through this set of 5 books. There may be tiny bits of information which you didnt know earlier)
Practice
Official Guide
Official Guide Quant
Additional:
The above mentioned books are the bare minimum you need to get a good score. Additionally, you may refer to any of these books for additional practice:
Kaplan 800 - Material only for those who are already at the 700 level
Kaplan Quant - Lot of questions
Veritas Books - Concepts + Good questions
Aristotle SC - Good revision of SC concepts
According to me, this should be sufficient. Of course, apart from this, mocks will be your best bet for additional practice.