Hello
B.Com is a 3 years undergraduate course in commerce field. The admissions are provided on the basis of percentage of marks secured in class XII or some colleges also conduct their own entrance exams.
Top colleges for B.Com are

• Shri Ram College of Commerce, Delhi
• Lady Shri Ram College for Women
• Jain University, Bangalore
• Loyola College, Chennai
• Chandigarh University
• St. Xavier's College, Kolkata

The average fees per year for B.Com in government colleges is 5,000 to 30,000 and for private colleges it may go upto 1,50,000 per year.

Good luck