Which of the following refers to the white salt which covers the land in some areas during dry season? (1) usar (2) reh (3) erg (4) reg

Which of the following refers to the white salt which covers the land in some areas during dry season? (1) usar (2) reh (3) erg (4) reg
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(2) reh Explanation: Reh refers to a mixture of soluble sodium salts appearing as efflorescence on the ground in arid or semiarid regions in India. It covers the land in the form of a white layer. It is also known as Kallar.
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