This task involves asking a question, providing a set of 2 options. You are expected to choose the best answer to the question. The output will be in the form of A or B, corresponding to which option is chosen.
Example: Question:Who was the man behind The Chipmunks? ,  Options: [A. David Seville, B. Alvin Seville] 
Example solution: A
Example explanation: David Seville was the man behind the Chipmunks. So, the correct answer is A.

Problem: Question:What is the next in the series: Nigeria, Sierra Leone, Tanganyika, Uganda, Zanzibar, Kenya, Malawi, Zambia, Gambia, Botswana, Lesotho, Mauritius? ,  Options: [A.Kingdom of Swaziland B.Sierra Leone] 

Solution: B