Are C Programmers currently in demand?

Yes,
I think for two reasons.
Previously after B.Tech, most of the freshers used to get trained in C and embedded systems. Nowadays, most of them go to ML. So the supply of C engineers is less. Most of the ML applications have to run finally on embedded systems and C is required here. So demand is also there.

But One has to be extremely good at C to clear interviews. C is very simple compared to other languages. SO the interviewer's expectation will be higher.

C programming is in demad only in special field of advanced computing. Why every student is taught C programming is that it is the base of all the high level languages. It's a procedural language. You learn the basics right when you program in c. Room for error is very less. I hope that answers the importance of C programming in the world of software development. 

Any type of 'good' programmers are currently in demand.

By good, I mean people with good analytical and problem solving skills. When a reputed firm hires, they never enforce you to use a specific language to solve a problem. They expect you to learn whatever tech stack they are working on.

The reasoning behind this is, the languages and frameworks change with speed more than you can imagine. Suppose, your project changes from technology A to technology B, it does not make sense to fire the previous developers and hire developers with experience exclusively in B. Most companies, therefore, require good learners and problem solvers.
If you find this answer absurd, feel free to explore interview experiences of companies like Google, Microsoft etc.