What is the purpose of ''rb'' in fopen() function used below in the code?FILE *fp;fp = fopen(''source.txt'', ''rb'');

open ''source.txt'' in binary mode for reading and writing

open ''source.txt'' in binary mode for reading

Create a new file ''source.txt'' for reading and writing

What is the purpose of ''rb'' in fopen() function used below in the co

1.	What is the purpose of ''rb'' in fopen() function used below in the code?FILE *fp;fp = fopen(''source.txt'', ''rb'');
A.	open ''source.txt'' in binary mode for reading
B.	open ''source.txt'' in binary mode for reading and writing
C.	Create a new file ''source.txt'' for reading and writing
D.	None of above
Answer» B. open ''source.txt'' in binary mode for reading and writing