use of Select tag in plugin

Hello,
i have used following code for my first plugin but the code is not working.

<select name=”employee_gender” id=”employee-gender”>
<option value=”male” <?php if(! empty ( $nm_stored_meta[’employee_gender’] ) ) selected($nm_stored_meta[’employee_gender’][0], ‘Male’ );?>>Male</option>’;
<option value=”female” <?php if( ! empty ( $nm_stored_meta[’employee_gender’] ) ) selected ($nm_stored_meta[’employee_gender’][0], ‘Female’ );?>>Female</option>’;
<!–<option value=”female”>Female</option>’; –>
</select>

function nm_meta_save( $post_id){
//checking sav status
$is_autosave = wp_is_post_autosave( $post_id);
$is_revision = wp_is_post_revision( $post_id);
$is_valid_nonce = (isset($_POST[‘nm_employee_nonce’]) && wp_verify_nonce($_POST[‘nm_employee_nonce’], basename(__FILE__)))? ‘true’ :’false’;

if(isset( $_POST[ ’employee_gender’])){
update_post_meta( $post_id, ’employee_gender’, sanitize_text_field( $_POST[ ’employee_gender’]));
}