Multiple choice Which one of the following is valid for opening a read-only ASCII file? fileOpen (filenm, "r") fileOpen (filenm, "ra") fileOpen (filenm, "read") fopen (filenm, "read") fopen (filenm, "r") Reveal answer Fill a bubble to check yourself E Correct answer Explanation In C, the standard library function to open a file is fopen. The mode 'r' is used to open a file for reading in text mode.