el for="country">Country</label>
                <select class="custom-select d-block w-100" id="country" required>
                  <option value="">Choose...</option>
                  <option>United States</option>
                </select>
                <div class="invalid-feedback">
                  Please select a valid country.
                </div>
              </div>
              <div class="col-md-4 mb-3">
                <label for="state">State</label>
                <select class="custo