in english activity topic punctuation puzzle1 i have submitted all the answers correctly and it is correctly matched also but its showing that my answers are wrong why????

We tried checking the same from our end, but the answers are showing up as correct after submission. Please cross-check the answers at your end, so as to make sure that whether the answers you are providing are correct or not. Here are the answers of the first puzzle of Punctuation:

1. ? (Question Mark)
2. , (Comma)
3. . (Full stop)
4. , (Comma)
5. ' (Apostrophe)
6. " (Quotation marks) 
7. " (Quotation marks)
8. . (Full stop)

Feel free to revert in case of any other queries regarding the same.