In a C program snippet, followings are used for definition of Integer variables?signed s;unsigned u;long l;long long ll;Pick the best statement for these.(A) All of the above variable definitions are incorrect because basic data type int is missing.(B) All of the above variable definitions are correct because int is implicitly assumed in all of these.(C) Only “long l;” and “long long ll;” are valid definitions of variables.(D) Only “unsigned u;” is valid definition of variable.