This is a one-shot C programming video (10+ hours) by Apna College, providing a comprehensive C language tutorial for beginners, complete with notes and practice questions.
freeCodeCamp
This course will give you a full introduction into all of the core concepts in the C programming language.
Learn C Programming
Learn C Programming using the book by Kernighan and Ritchi. This free C programming course offers interactive lessons and coding challenges to help you learn this language.