Concept: Pipeline transport has several benefits, but one of the listed options is actually a disadvantage.
Explanation: The question asks for the option that is NOT an advantage of pipeline transport.
Low maintenance cost, safety, and continuous flow of goods are all advantages of pipelines.
However, pipelines can be prone to leakages and unauthorised tapping by people.
Leakage is a major disadvantage, not an advantage.
Therefore, the correct answer is the option that mentions being prone to leakages.
Answer: D. Prone to leakages