Hey Priyansh, you can select multiple options from a dropdown using Select class. Selenium provides Select class to perform various operations on a dropdown. Below code automate selection of multiple options with the help of Select class:
public class MultiSelectDropdown {
    WebDriver driver;
    @Test
    public void testApp() {
        System.setProperty("webdriver.chrome.driver",  "D:\SeleniumDrivers\chromedriver.exe");
        driver = new ChromeDriver();
        driver.get("https://www.example.com/tags/tryit.asp?filename=tryhtml_select_multiple");
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        WebElement selectList = driver.findElement(By.xpath("//select[@name='cars']"));
        Select select = new Select(selectList);
        select.selectByVisibleText("Volvo");
        select.selectByVisibleText("Saab");
    }
}