Concept:The West African Students Union (WASU) was a nationalist organisation founded by a Nigerian lawyer in London to protect the interests of West African students.
Explanation:In 1925, WASU was formed in London by Ladipo Solanke, a Nigerian lawyer and nationalist.
His name appears in option D as Oladipo Solake.
He set up WASU to safeguard the welfare of West African students studying in Britain.
The union also promoted the broader political interests of West Africans living under colonial rule.
It became a strong voice for nationalism and unity among British West African colonies.
This is why the founder of WASU was the person listed in option D.
Answer:D. Oladipo Solake