In the following question, the sentence given with blank is to be filled in with an appropriate word. Select the correct alternative out of the four.
The vehicles involved in the accident were _____ the flow of traffic.

Options

A. obstructing
B. stalling
C. interfering
D. delaying

Answer

A

Explanation

obstruct (Verb) : to block a road, p assage etc. so that nothing can go along it.
Here, obstruction is the right usage.