Hello Anamika, Greetings!

Well, as you are a complete beginner, the best way to learn C language is to consult the book Let us C by Yashwant Kanetkar. It's easy to learn C with this book. The content is easy to understand and well explained .

After then, I suggest you to read C book by Dennis Ritchie, the one who found C. It's a good book for concept building. Learn by doing the exercises in it.

Thank you, best of luck.