Which of the following languages most commonly serves as a lingua franca in south and southeast asia?

Persian is a common language, as a lingua franca in South Asia, Central Asia and Middle east.

It's A) English 

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The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.

Answer the collision of tectonic plates;