I am a working professional and want to do MBA through distance. Which MBA specialization course should I pursue?

It depends on your interest or if you want to specialize in the field of your current job profile. You can get better options after doing the specialization in your job scenario. For further details, you can visit the below mentioned link: https://www.way2college.com/colleges/distance-mba

You should pursue the same field in which you are doing a job such as if you are in sales, you should opt for MBA in marketing. It is advisable to go for a part time MBA.