After an MBA in HRM, in which field can we pursue a PhD?

You can choose HRM, and opt for full time PhD, or even Part time PhD while working in a company. The benefits of part time is immense as you gain 4 years experience the time you also engage in doing PhD, and can switch jobs to a higher HR designation in other companies, or switch careers to teaching in universities, or even start up in HR consultancy with a PhD ta