If you open a file in "R+" mode, what does it mean?

اگر آپ "آر+" وضع میں فائل کھولتے ہیں تو ، اس کا کیا مطلب ہے؟

Opening a file for both reading and writing

Opening a file for writing only

Opening a file for reading only

None of these

"R+" mode opens an existing file for both reading and writing.

The file must already exist; it does not create a new file if one doesn’t exist.