Correct option is A
The jumbled word in the sentence is "ETNSIL."
Rearranging the letters, we can form the word SILENT.
SILENT is the correct word formed by rearranging the letters of "ETNSIL."
This is the word that fits the context of the sentence: "The silent night was interrupted only by the gentle rustling of leaves in the breeze."
Correct answer is (A).