Hi, I have got admit to Kent Business School, University of Sussex business school, Coventry University for MBA programme & University of Strathclyde has offered me MSc in Business Management.
I have 4 years of work experience in Marketing & Operations and I want to pursue my career in the UK after my master's.
What is the best option for me?

Strathclyde is the only one of these schools with a track record of placing international students in the UK market. The Strathclyde MBM is very good, since it can be converted to  an MBA after yiu have five years work experience. 

Thanks for your revert sir 
Can you please elaborate on how MBM from strath can be converted to MBA after 5 years of work experience?
I was leaned towards kent as it has got triple accreditation and being near London I will have access to MNC for internships and jobs.  

Google can answer your first question. 

Location is less important than the ability of the school to place students. UK jobs are not only or mostly in London. London has higher than average unemployment and a huge supply of international students around it in the southeast. Strathclyde MBM graduates end up with higher salaries than higher-ranked English schools like Manchester and Durham: https://rankings.ft.com/rankings/2858