Igbo

There are over 250 ethnic groups in the country with Hausa-Fulanis, Igbo and Yoruba – hailing from the north, south-east and south-west respectively - being the three largest.

One student, Favour Eke, told BBC Igbo that 10 of the 165 questions didn't appear on the screen - all she could see was the multiple choice options for the answers.

The company’s name melds their two cultures — David is of Yoruba and Igbo descent, and Jessica is Anglo-Saxon.

The fact most of the coup plotters were from south-eastern Nigeria meant the coup became known as an "Igbo coup" - a label Babangida rejects.

Dr Ibo admitted it was his colleagues - there are 35 doctors and 60 nurses at Saudi Hospital - who kept him going.