GMAT, GRE, TOEFL, and IELTS are two major exams that students attempt if they want to pursue MBA from a foreign country. Most of the business schools accept GMAT score but nowadays a lot of business schools are also accepting GRE score. Some of the universities take TOEFL and IELTS score into consideration.

The first and foremost eligibility requirement is to have completed a basic bachelors level graduation degree. This could be an engineering degree (B.E, B.Tech), B.Sc, B.Com, B.A. or in any other discipline. A Masters or doctoral (PhD) degree is also fine. 

From the exam point of view, you should give the GMAT exam and either IELTS or TOEFL for language proficiency.

HI,

The two primary exams are GMAT and GRE. Traditionally GRE was more popular among MS applicants and GMAT was the de facto standard for MBA courses. However, things are changing and many MBA universities have also started accepting GRE scores. 

Preferred English Language Tests on the Country basis

TOEFL for US, Canada

IELTS or PTE for UK, Australia, New Zealand

CAE or CPE for UK

GOOD LUCK