Simple example:
driver.get("http://www.sbsddsd.com/");
driver.manage().timeouts().implicitlyWait(300, TimeUnit.SECONDS);
Actions act = new Actions(driver);
WebElement parentMenu = driver.findElement(By.xpath("//div[@id='abc')]"));
act.contextClick(parentMenu).build().perform();
act.sendKeys(Keys.ARROW_DOWN).build().perform();
act.sendKeys(Keys.ARROW_DOWN).build().perform();
act.sendKeys(Keys.ENTER).build().perform();