Hello Muthu,

You can refer to this site for the best colleges in India and choose your college accordingly. 

https://bschool.careers360.com/colleges/ranking

Quantitative analysis (QA) is a technique that seeks to understand behavior by using mathematical and statistical modeling, measurement, and research. It aims to represent a given reality in terms of a numerical value. It is employed for several reasons, including measurement, performance evaluation or valuation of a financial instrument, and predicting real-world events, such as changes in a country's gross domestic product (GDP).

where as a business analyst is someone who analyzes the domains of the business and documents its business or process and assessing it