Which one of the following is known as uplands of delta region?

Which one of the following is known as uplands of delta region?

Bef
Bils
Peh
Chars
This question was previously asked in
UPSC NDA-2 – 2018
In the context of the Ganges Delta and similar deltaic regions, ‘Chars’ refer to sandy islands, newly formed land, or elevated tracts of land within or adjacent to river channels and deltaic plains. These ‘chars’ are relatively higher than the surrounding low-lying deltaic areas and are often used for cultivation after the flood season, making them the characteristic ‘uplands’ of such regions.
This question tests specific regional geographical terminology related to deltaic landforms, particularly relevant to the geography of South Asia (like the Bengal Delta).
‘Bils’ are low-lying wetland areas or depressions, often lakes or swamps, characteristic of deltaic floodplains (opposite of uplands). ‘Bef’ and ‘Peh’ are not standard widely recognized geographical terms for deltaic uplands. ‘Chars’ are dynamic features constantly changing due to erosion and deposition by rivers.
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