Should i use for an inheritance of 200k investment or funding MBA?

I think the answer depends on your personality, self-assessment and life-goal. If you are ambitious, enjoy working and aspired to take a management role, MBA can be considered as a valuable investment in yourself. Do your research on what opportunities MBA can bring and ask yourself if you would appreciate those opportunities.
If you have some target MBA schools, check the school document on median income and industries of graduates, search on LinkedIn to get the rough idea what people are doing after MBA from those schools. Normally MBA graduates start career in investment, consulting and tech; if you are interested in those industries and you think it's hard to get into with your current educational background and experience, MBA can be a good choice.
From financial perspective, build your own financial model to estimate your asset when you reach 65, assuming you are willing to work until 65. Compare between 2 "investments" output with the input as your current salary, your prospect payrise without MBA, your income if you invest 200k, your prospect salary if getting MBA. Don't forget to project your loss income in 2 years if you take MBA and make prudent assumptions with both options.
Lastly, evaluate life impact. If you want to take MBA, do you plan to study overseas, do you want to experience overseas life, or do you have any current commitment in Singapore?
Overall, MBA is a big commitment in both time and money, make your own due-dilligent to decide if it is for you.