Q.Which mode of transport is used specifically and exclusively for the continuous movement of liquids and gases such as crude oil, petroleum products and natural gas?
(A) Rail Transport
(B) Water Transport
(C) Pipeline Transport
(D) Road Transport

Only pipeline transport is built exclusively for the continuous movement of liquids and gases, unlike every other mode, which carries solid goods too.

Pipeline Transport is a specialised, fixed mode used for the continuous movement of liquids and gases — crude oil, petroleum products, natural gas, and in some installations water — directly from source to destination, without the loading/unloading handling other modes require. Its defining limitation is that it is confined entirely to the specific fluid/gas commodities it is built for, and cannot carry any solid goods at all.

Option-by-option analysis:

• (A) Incorrect — Rail Transport carries a wide range of solid bulky/heavy goods as well as some liquids in tank wagons; it is not restricted to liquids/gases only. …