None of the option are correct .
Above question get error on line no 5 when it calling 'saleltem.currprice()'.

//Guessing that the definition of object were somehting like following

function Item(name, price){this.name = name; this.price=price};
function Saleltem(name, price, discount){this.name = name; this.price=price; this.discount = discount};
// And no SaleIntem does not extends Item nothing metion in the exercice about it...
let regltem =new Item('Scarf', 50); //Name, price
let saleltem = new Saleltem('Shirt' ,80, 0.1); //Name, price, discount

Item.prototype.currprice= function () { return this.price;}

console.log(regltem.currprice()); 50
console.log(saleltem.currprice()); // --> Error

Saleltem.prototype.currprice = function () { return this.price - (this.price * this.discount); }

console.log(regltem.currprice());
console.log(saleltem.currprice());

//The output would be something like
// 50
// Uncaught TypeError: saleltem.currprice is not a function

Let regltem =new Item('Scarf', 50); //Name, price
Let saleltem = new Saleltem('Shirt' 80, 0.1); //Name, price, discount
Item.prototype.currprice= function () { return this.price;}
console.log(regltem.currprice());
console.log(saleltem.currprice());
Saleltem.prototype.currprice = function () { return this.price - (this.price * this.discount); }
console.log(regltem.currprice());
console.log(saleltem.currprice());
What is the output when executing the code above?
Answer : 50 80 50 72

Let regltem =new Item('Scarf, 55);
Let saleltem = new Saleltem('Shirt' 80, -1);
Item.prototype.description = function () { return This is a' * this.name;
console.log(regltem.description();
console.log(saleltem.description();

Saleltem.prototype.description = function () { return 'This is a discounted'+ this.name;}
console.log(regltem.description();
console.log(saleltem.description(0);