Consider the following reactions
'A' is :

The major product obtained from the following reaction is :

Which of the following compounds shows geometrical isomerism?

Arrange the following solutions in the decreasing order of pOH :

(A) 0.01 M HCl
(B) 0.01 M NaOH
(C) 0.01 M CH₃COONa
(D) 0.01 M NaCl