2016 Business AD paper consisted of

2 finance questions
1 marketing question
1 management question
2 supply chain/operation management question
1 Hr related question

(Candidates were supposed to answer any 4)

Even though the course is a bit lengthy. Still it can be easily done in a matter of 6 to 8 days (Since you have already study all of the things in MBA)

My suggestion is to go for business AD. its quite scoring and course is easy to cover.