രാജ്യവ്യാപകമായി 5G സംവിധാനം ആരംഭിച്ച ലോകത്തിലെ ആദ്യ രാജ്യം ഏതാണ് ?
Aചൈന
Bഅമേരിക്ക
Cദക്ഷിണ കൊറിയ
Dഉത്തര കൊറിയ
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