I am getting a collection of a data, which is questions from mongoDB, and I putting that in a set of random question. The set is not taking the input, and it is returning empty.

 module.exports.java = async (req, resp) => {
// const choice = req.body;
let quest = [];
let option = [];
let sort =[];
try {
    let data = await Questions.find({ type: 'javascript'})
    //for creating an array of questions
    data.forEach((elements) => {
        //Stores all the string in an array
        quest.push(elements.description);
        option.push(elements.options);
    })
    const unique = new Set()
    for (let i =0; i<10;i++){
        let rand = Math.floor(Math.random()*20+0);
        let input = quest[rand]
        unique.add(input);
        // console.log(typeof quest[rand])
        console.log('Inside the loop, quest: ' + input)
        console.log('Inside the loop, unique: ' + unique)
    }
    resp.send(unique)
}catch(e) {
    console.log(e)
}