Fill in the blank with the appropriate phrase.
Everything is going on well. The Student's Union ________ any problem so far.
The correct option is A Has not presented
Here, 'has not presented' in present perfect tense is correct because it is used to indicate an action which started in the past and has continued
up untill now.
'Have not...' is incorrect because 'union' is a singular noun, not plural noun. Thus, usage of 'has' is correct.
'Do/does....' is incorrect because does is used with third person singular pronouns (he, she, it) and with singular noun forms. We use do with other personal pronouns (you, we, they) and with plural noun forms.