Imperial Palace is in Japan (iii). Kremlin Palace is in Russia (i). Statue of Liberty is in USA (iv). Kinder Disk (Kinderdijk windmills) is in Denmark per the options (ii). So (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii), which matches option 2.
Note: Kinderdijk is actually in the Netherlands, but based on the given options, (ii) Denmark is the intended match.