Which sentence does not contain any punctuation errors?

a. she is back from her grandmother's; in fact, there she is now.

b. she is back from her grandmother's, in fact, there she is now.

c. she is back from her grandmother's in fact; there she is now.

d. she is back from her grandmother's, in fact there she is now.

I would say number "A" is correct. If you read all of them out loud, pausing for each comma/semicolon, you might notice that "A" and "B" sound the most reasonable. It may depend, but I would go with number "A" because the semicolon makes a bit more sense than a comma. It can be tricky to identify the difference sometimes. I hope this helped :)