The World Health Organization (WHO) doesn't directly "recognize" medical colleges in the sense of granting accreditation. WHO's role is primarily to maintain a directory of internationally recognized medical schools – the
World Directory of Medical Schools (WDMS). Inclusion in the WDMS indicates that a medical school meets certain basic standards, but it's not a guarantee of quality or equivalence to standards in any specific country.
Therefore, the ultimate recognition of a medical college in Bangladesh rests with the Bangladesh Medical and Dental Council (BMDC), which is the national regulatory body responsible for accrediting and licensing medical schools and doctors in Bangladesh. A medical school listed in the WHO's WDMS likely also holds recognition from the BMDC.