Dear Nymishaa,
I want to know which specialization you chosen for work and which area you like to choose. If you go with HR - you can go with Diploma for 1 year.(eHRM, SHRM, Labor Laws etc) or go with Software ERP's like SAP, Peoplesoft, Oracle HRM etc.
Marketing - Experience plays the vital role and also you can take International Business, Export and Import in Diploma.
As Mr.Mudassar Shaikh told you have to get experience and go with knowledge.
All the Very best...!