Which of these is not a correct statement?

(a) A recursive method must have a base case

(b) Recursion always uses stack

(c) Recursion is always managed by C# Runtime environment

(d) Recursive methods are faster that programmer written loop to call the function repeatedly using a stack

I got this question during an interview for a job.

My query is from Recursion topic in portion Object Oriented Concepts of C#

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