The correct answer is: You should have taken permission of your parents before taking this important decision.
The verb “take” is conjugated in the past participle form in this sentence. The past participle form of “take” is “taken.” This is because the sentence is in the passive voice. In the passive voice, the subject of the sentence is acted upon by the verb. In this case, the subject of the sentence is “you,” and you are being acted upon by the verb “take.”
The other options are incorrect because they are not in the past participle form. The verb “taked” is not a word in the English language. The verb “took” is the past tense form of “take,” but it is not the past participle form. The verb “should took” is not a word in the English language.
Here is a diagram that shows the conjugation of the verb “take”:
| Tense | Singular | Plural |
|—|—|—|
| Present | take | take |
| Past | took | took |
| Past participle | taken | taken |
I hope this explanation is helpful!