[Answer] Which country has the longest-reigning monarch after the U.K.?

Step 1 : Introduction to the question "Which country has the longest-reigning monarch after the U.K.?"

...1. Thailand 2. Denmark 3. Brunei 4. Sweden

Step 2 : Answer to the question "Which country has the longest-reigning monarch after the U.K.?"

Brunei - The Sultan of Brunei, Hassanal Bolkiah, has been in power since 1967, which was 14 years after the U.K.'s Queen Elizabeth II was crowned. At the age of 21, the ruler of the tiny oil-rich state in Southeast Asia ascended to the throne after his father abdicated. In addition to being the sultan, he also is the country's prime minister and heads the military — making Brunei one of the world’s few remaining absolute monarchies. Once the world’s richest man, Bolkiah is thought to be worth $28 billion USD and owns a collection of over 500 Rolls Royce automobiles. He lives in the largest palace in the world, the Istana Nurul Iman, which houses a staggering 1,788 rooms.:

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