A student prepared 20% NaOH solution in a beaker containg water. The observation made by him are as follows :
(i) NaOH are in the form of pellets.
(ii) It dissolves readily in water.
(iii) The beaker appears cold from outside.
(iv) Red litmus paper turns blue when dipped in the solution.
The correct observation are :

Options

A. i,ii,iii
B. i,iv,iii
C. iii, iv,i
D. i,ii and iv

Answer

D

Explanation

i,ii and iv