Comprehension:

In the following passage some of the words have been deleted. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

The thought here is that because saliva is (1) ________ alkaline, stimulating it by chewing gum after eating (2)_____ help neutralize the acidity in your mouth and throat. (3)______ a very small study from 2005 did (4)_______ some merit to this approach, the size of the study makes it difficult to (5)_______ any real conclusions.

Select the most appropriate option to fill in blank number  4. 

find

- The most suitable word for the blank 'find'.

- The complete sentence is: While, a very small study from 2005 did find some merit to this approach.

-  By using the word "find" in the blank, it indicates that the small study conducted in 2005 discovered or concluded that there was some merit or value in the approach being discussed.

- The present tense form of the word 'find' proceeds 'did'.