Where can you find the largest 'alphabet gaps' when you list world countries in alphabetical order?
An 'alphabet gap' is measured by assigning each letter a value (A = 1, B = 2... Z = 26) and multiplying it so that the initial letters counts more etc
As a hint you are shown the 'differences' between the first 4 letters (so if the first value is 0, the answers have the same initial) - see examples at the end