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Option 1: Japan
Option 2: China
Option 3: USA
Option 4: India
The correct answer is option 1: Japan. Japan has officially recognized Bitcoin as a legal payment method since 1st April 2017. This means that businesses and individuals in Japan can use Bitcoin for transactions, just like they would use any other legal currency. This recognition of Bitcoin as a legal payment method has helped to legitimize the use of cryptocurrencies in Japan and has led to a growing acceptance and adoption of Bitcoin by merchants and consumers. It is important to note that while Japan has recognized Bitcoin as legal tender, the use of Bitcoin in other countries may vary. Therefore, it is essential to understand the regulations and legal status of Bitcoin in the specific country you are in or dealing with.