Choose the correct option to complete the sentence given below. In case no option is correct, choose “None of the above”.
The introduction of tea and coffee and such other beverages ______ not been without some effect.

Correct option is B

The correct option is (b).

• Explanation: The subject of the sentence is “The introduction”, which is singular. The phrase “of tea and coffee and such other beverages” only qualifies the subject and does not affect the verb. Therefore, the singular auxiliary has is correct.
• Correct answer word – has
  Hindi meaning: है / ने है
  Example: The arrival of guests has changed the atmosphere.
• Grammar Rule involved: The verb agrees with the main subject, not with the nouns in the prepositional phrase following it.
• Why other options are incorrect:
  • have is plural and does not agree with the singular subject introduction.
  • had would change the tense and is not suitable here.

So the correct answer is (b)