Despite endless efforts, no one has been able to prove that God exists; we may just as well stop trying and accept the truth: there is no God.

A false one!

Or homework ;)

Fallacies can be formal or informal, with all sorts of categories and designations, such as begging the question, affirming the consequent, converse fallacy of accident, and non sequitur, to name a few.

As was alluded to above, this board is not designed to do homework for people. If you would care to discuss what you think the answer might be, and why, you might get better results.