Capital Cities

What Middle Eastern country has Muscat as its capital and uses the rial as its currency?

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Port Louis is the capital of which country?
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Which country has Hagatna (Agana) as its capital?
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What is the capital of Vietnam and the country's second largest city?
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What is the capital city of Botswana?
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What is the capital city of the province of Saskatchewan, Canada?
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Tajikistan, formerly part of the USSR, boasts which city as its capital?
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Which capital city is furthest south?
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Which of these continent - country - capital groups is correct?
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