diff --git a/03 - Chai aur Javascript/12 - Object Oriented Programming/05_polymorphism.js b/03 - Chai aur Javascript/12 - Object Oriented Programming/05_polymorphism.js
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+// Polymorphism
+
+class Animal{
+    //  ye class mein generic method makeSound() define karenge
+    makeSound(){
+        console.log("Animal Makes a Sound.");
+    }
+}
+
+// Child classes mein Animal class ko extend karenge aur makeSound() method ko apni specific implementations ke sath override karenge
+
+class Dog extends Animal{
+    makeSound(){
+        console.log("Dog Makes Sound of Bow! Bow!")
+    }
+}
+
+class Cat extends Animal{
+    makeSound(){
+        console.log("Cat Makes Sound of Meow! Meow!");
+    }
+}
+
+// ek function banaenge jo generic interface provide karega jo kisi bhi animal ke object ke liye makeSound() method ko call karega 
+function animalSound(animal){
+    animal.makeSound();
+}
+
+const dog = new Dog();
+const cat = new Cat();
+
+animalSound(dog)
+animalSound(cat)
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