Question

21. Which of the following sentences is correctly punctuated?
I have taken notes on your book however I still have questions.
I have taken notes on your book, however I still have questions.
I have taken notes on your book; however, I still have questions.
I have taken notes on your book however; I still have questions.

Answer 1

$\underline {\underline {\huge{\mathfrak {ANSWER ;}}}}$

I have taken notes on your book; however, I still have questions.

Answer 2

your second one is the correct