Hi. I want to pursue my MBA right after completing my Bachelors in Business Administration.So far, I have noticed that most universities have a mandatory requirement of at least 2-3 years of work experience prior to being accepted in their MBA programme. I would really appreciate if you guys can name some of the top ranked MBA unis (preferably in the US, Canada, UK or Australia) where having work experience is not compulsory. Thanks in advance.

It's very unlikely that you will gain admission without astonishing accomplishments. Look instead at master's in management programmes. These will be better.

To be fair the Stanford MBA does not require work experience:

https://www.gsb.stanford.edu/programs/mba/admission/application-materials/professional-experience

... However, for a school like this, it's extremely rare that they would let anybody in with no work experience. They're basically leaving themselves the option, just in case a one-in-a-million candidate comes around.