The narrator remembered the address her mother had told her only once. It was number 46, Marconi Street. Her mother’s acquaintance Mrs Dorling lived there. She had stored the valuable belongings of the narrator’s mother there. After her mother’s death, the narrator had an urge to visit the place. She wanted to see those things, touch them and remember.

The correct answer is option 'D', Number 46, Marconi Street. The author's mother asked her to remember this address for a specific reason. Let's explore the details below:

1. Context:
The address that the author's mother asked her to remember is mentioned in a passage or text. This passage is part of the Class 11 curriculum.

2. The Author's Mother's Request:
The author's mother specifically asks her to remember the address, indicating its importance. It suggests that the address holds significance in the context of the passage or the author's life.

3. Option 'A': Number 50, Marconi Street:
This option is not the correct answer. Although it has the same street name as the correct option, the number is different. The mother's request was to remember number '46', not '50'.

4. Option 'B': Number 46, Baker Street:
This option is not the correct answer. Although it has the correct number '46', the street name is different. The mother's request was to remember the address on Marconi Street and not Baker Street.

5. Option 'C': Number 54, Marconi Street:
This option is not the correct answer. Although it has the same street name as the correct option, the number is different. The mother's request was to remember number '46', not '54'.

6. Option 'D': Number 46, Marconi Street:
This option is the correct answer. It fulfills the conditions mentioned by the author's mother. The requested address is on Marconi Street, and the number is '46'. The author is advised to remember this address, indicating its importance in the passage or their life.

In conclusion, the correct address that the author's mother asked her to remember is Number 46, Marconi Street. This address is important within the context of the passage or the author's life.

Number 46, Marconi street