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On adding a few drops of universal indic...

On adding a few drops of universal indicator solution to three unknown colourless solutions `P,Q,` and `R` taken separately in three test-tubes shown in the diagrams, a student observed the changes in colour as green in solution `P` red in solution `Q` and violet in solution `R`.
The decreasing order of the pH of the three solutions is:

A

`PgtQgtR`

B

`RgtPgtQ`

C

`QgtPgtR`

D

`RgtQgtP`

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The correct Answer is:
A
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