Brushing twice a day following a proper brushing technique (ask your dentist) is more than sufficient. Night brush is very important as the flow of saliva reduces during night thus making the teeth susceptible to decay.Also rinse well after every meal to allow the remaining food particles flush out ,thus keeping the mouth clean for longer durations.

Normal brushing daily aided by warm salt water mouth wash is good.

Best practise is just to brush twice daily but properly. no need of saline rinse or mouth wash as the mouth wash tends to stain the teeth if used for more than 2 weeks.

hello, you need to visit a dentist every 6 months and get a scaling and polishing done. brush twice daily, floss regularly, rinse after every meal.

Best is brushing twice+flossing+mouthwash...also get a scaling/check up done every 6 months...that way you can ensure that you did everything you can to maintain a good oral hygeine

No need of two options. Brushing twice a day in PROPER TECHNIQUE, is needed. Please go through some online videos from good soirces, or consult a good dentist.