Every specialization is best in their own terms. If you talk in placements perspective then Financial Management, Operations Management and Marketing Management are the ones which are in most demand in market. There are numerous of Jobs offered by companies which needs students who have a better knowledge in these streams. But I would suggest you to choose  as per your interest, passion & by your ability to study relavant skill require to study subject. The placement package depends on the institute you are pursuing teh programme & the Organization.
If you are interested in HR then For HR, you need to have interest in human pyschology, organizational behavior, dealing with range of professional, employee psychology, resolving work place political issues.

There are various job opportunities in the field of human resource management. You can work in the industries, corporate, colleges & schools and MNC’s. All the  industries need to hire an HR administrator to settle and handle the activities regarding the hiring of employee, their benefits, compensation, salary settlement, training & development and maintain the work performance of the employee.

The choice should be yours as per your interest.

Good Luck!