Answer to Q4 : e

Frequent small meals, elevation of head end of bed and avoiding foods such as Coffee, Tea, Alcohol - all of which decrease the LES tone would help alleviate symptoms.

If these fail, then one should start with a Proton pump inhibitor - in this question Choice "a".

Some candidates will see Omeprazole as the first choice, not even look at the other options and move on. Beware of such questions where a better answer may be sitting lower down in the list of choices.