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The gold numbers of three protective col...

The gold numbers of three protective colloids A, B and Care 0.05, 0.01 and 0.5 respectively. The decreasing order of their protective power is:

A

`B. C, A`

B

`A, B, C `

C

`B, A, C`

D

`C, A, B.`

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The correct Answer is:
C
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