[[1]] and[[2]] were divided on the basis of language.

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Detailed Solution

Sri Lanka and Pakistan were divided based on language.
A law recognising Sinhala as the only official language of the nation was introduced by the Sri Lankan Parliament (then known as Ceylon) in 1956. As a result, all public schools, institutions, and courts would now offer instruction in Sinhala and administer public tests. The minority Tamil-speaking population in the island's north opposed the new Act. The Tamil-speaking minority in Sri Lanka has been forced to speak the Sinhala language, which has caused decades of civil violence there. Pakistan, another nation in South Asia, was divided because Bengali speakers in the east felt like their language was being suppressed.

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