Which sentence is ,begin emphasis,not,end emphasis, punctuated correctly?

Question

Answer options with 4 options
1.
The book ,begin underline,Frankenstein,end underline, was written by Mary Shelley, who wrote the novel at age 19.

2.
The story is about a doctor who created a monster.

3.
Frankenstein, which is often thought to be the monster's name, is actually the name of his creator.

4.
Mary Shelley who was also married to a famous English poet lived in the 19th century.

Answer 1

The sentence that is not punctuated correctly is:

4. Mary Shelley who was also married to a famous English poet lived in the 19th century.

This sentence should include commas to set off the non-restrictive clause:

"Mary Shelley, who was also married to a famous English poet, lived in the 19th century."