Decreasing order (first having highest and then other following it) of mass of pure NaOH in each of the aqueous solution
(P) 50 gm of `40%(w//w)` NaOH
(Q) 50 gm of `50%(w//w)` NaOH `[d_("soln.")=1.2gm//ml]`
(R) 50 gm of 20 M NaOH `[d_("soln").=1gm//ml]`

Options

A. I,ii,iii
B. iii,ii,i
C. ii,iii,i
D. ii,I,iii

Answer

B