The correct option is
B LONDON
Code = [15 – 12 – 13 – 23 – 12 – 13]
Let's write the letters from A to Z, and number them as per their positions.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1607532/original_Apr_-_6_%284%29.png)
Now, if we match the letters with the respective numbers,
the word we can make is:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1661697/original_Slide_4-01_%282%29.png)
So, the word we get is 'Olmwlm'. There is no such place named 'Olmwlm'.
Now, let's write the letters from Z to A, and number them as per their positions.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1607564/original_Apr_-_6_%285%29.png)
Now, if we match the numbers with the letters, we get;
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1661698/original_Slide_4-02_%281%29.png)
Hence, the codes word the spy wanted to mention is LONDON.