Assuming asking for MBA specialization, Each specialization has good scope in its own field, It depends on your career goal & interest. MBA has become an entry level qualification for most of the organization.

Here are some of the top MBA specialization which you can choose as per your interest.

MBA in Finance: MBA in finance is one of the best specialization that focus on Management accounting and control. after this you can go for various options like banks, Financial consulties & Financial Institution etc. 

MBA in Marketing: MBA in marketing has a lot of job opportunities. It helps you in enhancing the skills & knowledge in the field of marketing, advertising & public relations.

MBA in operation Management: Operation in management focuses on manufacturing or production Management which help you to ensure smooth and safe Business Operation.

MBA HR: A Human resource Manager is required by all the sector. If you have good communication skills, pleasant personality & love to intract the people then you can go for it.

MBA in Information Technology: It is also one of the popular specialization and this field require highly qualified & skilled people.

If you are interested to get admission in IIM's The courses offered in the first year are common for everyone. Your specialization depends on your selection of elective courses in 2nd Year.

You can check all the top entrance exam for MBA with given below link.

List of top Management Exams in India

 Please let me know if you have any other query.