Which of the following are the correct statements about delegates?

(a) Delegates can be used to implement callback notification

(b) Delegates permit execution of a method on a secondary thread in an asynchronous manner

(c) Delegate is a user defined type

(d) All of the mentioned

I have been asked this question by my school principal while I was bunking the class.

This intriguing question comes from Delegates in Detail topic in chapter Delegates, Generics and LINQ of C#

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