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The elevation of boiling point for 1M ur...

The elevation of boiling point for 1M urea, 1M glucose, 1M NaCl and `1M` `K_2SO_4` are in the ratio

A

`1 :1:2:3`

B

`3:2:1:1`

C

`1:2:3:4`

D

`2:2:3:4`

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