Answer:
The largest river system in Bhutan, Drangme Chhu is the Bhutanese name for the holy Manas River. The 376 kilometres long river flows across Bhutan spanning 272 kilometres and covers the rest 104 kilometres by passing through the Indian state of Assam
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After the rise of Islam in the Hejaz, Arab culture and language were spread outside the Arabian Peninsula through conquest, trade and intermarriages between members of the non-Arab local population and the peninsular Arabs. The Arabic language began to serve as a lingua franca in these areas and dialects were formed.
4) Shinto is the right answer
The largest group: Catholics
The second largest: Orthodox
Then: Protestant