The correct prototype for the following function heading is bool F1(double ro, int size, int &p1) A bool F1(r, size, p1); B bool F1(doubler, int size, int &p1); bool F1(double , int, int &); D F1(r, size, p1); The C++ statement used to dose the file named infile is A) infile.close(); B) infile.closeFile(); close("infile"); D closeFile("infile"); The output printed after executing the following C++ code is 39. int ex=93, ct : switch (ex % 16) { case 0: case 1:case 2 :case 3: cout