code: public int numOfSelectOptions() {
          if (isNotPresentSelect()) {
              return -1;
          }
          WebElement webElement = element.getWebElement();
          Select dropdown = new Select(webElement);
          List<WebElement> options = dropdown.getOptions();
          return options.size();
      }
docs: Retrieves the number of select options in the element. If the element
  isn't present or a select, the returned response will be negative 1.
  
  @return Integer: how many select options are available in the select
  element