Choose the incorrect part of the sentence:
She oftenly spoke of her childhood with nostalgia even after so many years.
A. She oftenly spoke
B. Of her childhood
C. With nostalgia
D. Even after so many years

Hint: The question suggests that it contains an incorrect part. Observe the parts of the question carefully, to find out the incorrect part. There is no word as oftenly.

Complete step by step answer:
Let us analyse each option individually to know the correct answer.

She oftenly spoke: This part of the sentence consists of a wrong word ‘oftenly’ no such word exists.
The correct word is ‘often’ which means at a regular interval, frequent. Therefore, this is the wrong part of the sentence.
Of her childhood: This part of the sentence is grammatically correct and free from error. Therefore, this is an incorrect option of the question. Of her childhood means details related to her childhood.
With nostalgia: This part of the sentence is grammatically correct and free from error. Therefore, this is an incorrect option of the question. Nostalgia means to revisit or remember memories from the past.
Even after so many years: This part of the sentence is grammatically correct and free from error. Therefore, this is an incorrect option for the question. This refers to a time interval suggestively long.

So, the correct answer is “Option A”.

Note:
The word often cannot be used as an adjective. There is a word to use it as an adjective, ‘frequent’. Both words are the same in meaning. They mean at regular intervals, many or several times. Some synonyms of the word often are regularly, repeatedly. Some antonyms if the same word is seldom, rare. Example: He seldom comes to the club these days.