Update kotlin-quiz.md (Ebazhanov#1125)

* Update kotlin-quiz.md Q4 * Update kotlin/kotlin-quiz.md Co-authored-by: Evgenii <[email protected]> Co-authored-by: Evgenii <[email protected]>
Tristen-e · Feb 11, 2021 · 685e4f2 · 685e4f2
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diff --git a/kotlin/kotlin-quiz.md b/kotlin/kotlin-quiz.md
@@ -40,7 +40,8 @@ class Airplane(private val name: String) : Aircraft() {
 #### Q4. Inside an extension function, what is the name of the variable that corresponds to the receiver object
 
 - [ ] The variable is named **it**
-- [ ] The variable is named **this**
+- [x] The variable is named **this**
+[reference](https://www.programiz.com/kotlin-programming/extension-functions#:~:text=The%20class%20name%20is%20the,function%20refers%20the%20receiver%20object)
 - [ ] The variable is named **receiver**
 - [ ] The variable is named **default**