Assertion: During colonial period (British period) millions of the indentured labourers were sent to Mauritius, Caribbean islands (Trinidad, Tobago and Guyana), Fiji and South Africa by British from Uttar Pradesh and Bihar.
Reasoning: All such migrations were covered under the time-bound contract known as Girmit Act (Indian Emigration Act).

Both Assertion (A) and reasoning (R) are correct and but R is not the correct explanation of A.

During colonial period (British period) millions of the indentured labourers were sent to Mauritius, Caribbean islands (Trinidad, Tobago and Guyana), Fiji and South Africa by British from Uttar Pradesh and Bihar. All such migrations were covered under the time-bound contract known as Girmit Act (Indian Emigration Act).