Tick the correct option to complete the sentence: The Prime Minister held…

Based on the sentence structure, the correct completion is: "The Prime Minister held a press conference at the airport."

Here is the breakdown of why this is correct:

Article Usage: "Press conference" is a countable noun, so it requires the indefinite article "a" to indicate one such event.

Definite Article with Location: "Airport" is a specific location in this context, requiring the definite article "the" before it.

Therefore, Option B is the correct option.