Examine the four jumbled sentences. Out of the given options, pick the one that gives their correct order.

A. The reason was that he was not properly dressed.
B. There is a story of Birbal not being allowed to attend the king’s free lunch.
C. This happened despite his high intellectual abilities.
D. The advice thus conveyed is ‘Don’t judge a book by its cover.’ 

BACD

The correct answer is Option (1) - BACD

The correct order is: BACD. Here's why:

B. There is a story of Birbal not being allowed to attend the king’s free lunch. This introduces the story and sets the scene.

A. The reason was that he was not properly dressed. This explains why Birbal wasn't allowed to attend the lunch, following the introduction of the story.

C. This happened despite his high intellectual abilities. This highlights the surprising aspect of the story, that Birbal's intelligence didn't guarantee him entry.

D. The advice thus conveyed is ‘Don’t judge a book by its cover.’ This draws a moral lesson from the story, emphasizing the importance of not judging based on appearances.

This order presents the story chronologically, then emphasizes the surprising detail, and finally delivers the moral takeaway.