STATISTICS HELP URGENT!!!
Please help!

A new medical drug used as an aid for those who want to stop smoking is tested. The adverse reaction of nausea has been studied in clinical trials, and the table summarizes the results. Find the test statistic needed to test the claim that nausea is independent of whether the subject took a placebo or the new drug.
Placebo | New Medical Drug
Nausea: 10 | 145
No nausea: 795 | 122

o 6.635
o 116.395
o 97.254
o 456. 473

Please help, I'm struggling with this one.