Step 1: Understand the sentence
"The whole family got together \underline{\hspace{0cm}} Diwali" means the reunion happened on the occasion of Diwali. We must use the preposition that fits events/festivals.
Step 2: Evaluate options
(A) of Diwali — incorrect usage, not idiomatic in English.
(B) at Diwali — correct idiom. We say "at Christmas," "at Diwali," "at Easter," etc., to refer to festive occasions.
(C) in Diwali — unnatural; "in" is used for months/years ("in October," "in 2022"), not for festivals.
(D) till Diwali — means "up to Diwali," changes the meaning of the sentence completely.
\[
\boxed{\text{The whole family got together at Diwali.}}
\]
| a | Phileas Fogg and Jean Passepartout | i | William Shakespeare |
| b | Don Quixote and Sancho Panza | ii | Jules Verne |
| c | Candide and Pangloss | iii | Miguel de Cervantes |
| d | Dogberry and Verges | iv | Voltaire |
| a | Phileas Fogg and Jean Passepartout | i | William Shakespeare |
| b | Don Quixote and Sancho Panza | ii | Jules Verne |
| c | Candide and Pangloss | iii | Miguel de Cervantes |
| d | Dogberry and Verges | iv | Voltaire |