> Buddhism is the dominant religion in Bhutan, Myanmar, Cambodia, Mainland China, Hong Kong,[5] Japan,[6] Tibet, Laos, Macau,[7] Mongolia, Singapore,[8] Sri Lanka, Taiwan, Thailand, Kalmykia and Vietnam.[9] Large Buddhist populations live in North Korea, Nepal, India and South Korea. China is the country with the largest population of Buddhists, approximately 244 million or 18.2% of its total population. - https://en.wikipedia.org/wiki/Buddhism_by_country

How many ethnic groups do you reckon that to be?

> Islam is the largest religion in Indonesia, with 86.7% of the Indonesian population identifying themselves as Muslim in a 2018 survey.[1][2] Indonesia is the most populous Muslim-majority country, with approximately 231 million adherents.[3] - https://en.wikipedia.org/wiki/Islam_in_Indonesia

> A majority of the Javanese people identify themselves as Sunni Muslims - https://en.wikipedia.org/wiki/Javanese_people

> Today, most Sundanese are Sunni Muslims. - https://en.wikipedia.org/wiki/Sundanese_people

> The majority of Madurese practice Sunni Islam. - https://en.wikipedia.org/wiki/Madurese_people

How often is Indonesia mentioned in the Koran?