(A) - (II) potable → Potable water means drinkable/safe water, which makes sense for remote areas lacking clean water access.
(B) - (I) portable → Portable means easily carried/moved, which fits with sleek gadget design.
(C) - (III) ceiling → Ceiling is the overhead interior surface where damp patches would appear after heavy rain.
(D) - (IV) sealing → Sealing wax is used to close/seal things, preventing packets from spilling open.
Hence, Option 2: (A) - (II), (B) - (I), (C) - (III), (D) - (IV) → This question tests understanding of homonyms (words that sound similar but have different meanings). Potable (drinkable) vs portable (movable) and ceiling (overhead surface) vs sealing (closing/fastening) are commonly confused pairs. → correct