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A student prepared 20% sodium hydroxide ...

A student prepared 20% sodium hydroxide solution in a beaker to studey saponification reaction. Some observations related to this are given below:
Sodium hydroxide solution turns red litmus blue.
sodium hydroxide readily dissolves in water.
The beaker containing solutions appears cold when touched from outside
The blue litmus paper turns red when dipped into the solution

A

I,ii and iv

B

only iii and iv

C

I,ii and iii

D

only I and ii

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MODERN PUBLICATION-CARBON AND ITS COMPOUNDS-EXERCISE
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