The correct answer is option 'c) Is being looked'.

Explanation:
The given sentence is in the passive voice, which means that the subject is being acted upon. In passive voice constructions, the verb is formed using a combination of the auxiliary verb "to be" and the past participle of the main verb.

In this case, the verb that needs to be used is "to look into", which means to investigate or examine something. The correct formation in the passive voice would be "is being looked into" because the action is currently happening and being performed by the relevant authority.

Let's break down the options:

a) Is looked: This option is incorrect because it uses the simple present tense "is looked", which does not indicate that the action is happening currently. Also, "is looked" is not the correct verb form of "to look into" in the passive voice.

b) Has looked: This option is incorrect because it uses the present perfect tense "has looked", which indicates that the action has already been completed. However, the sentence implies that the matter is currently being investigated.

c) Is being looked: This option is correct because it uses the present continuous tense "is being looked", which indicates that the action is currently happening. Additionally, "is being looked" is the correct verb form of "to look into" in the passive voice.

d) Was looking: This option is incorrect because it uses the past continuous tense "was looking", which indicates that the action was happening in the past. However, the sentence implies that the matter is currently being investigated.

Therefore, the correct option is 'c) Is being looked'.

As in the question there is now and it is present tense so the answer will be option C