The correct answer is: I wanted to do it but I had no time. I was very busy.
The verb “want” is used to express a desire or wish. In this case, the speaker is expressing a desire to do something, but they are unable to do it because they do not have the time. The verb “had” is used to express a past action or event. In this case, the speaker is saying that they did not have the time to do something in the past. The verb “have” is used to express possession or ownership. In this case, the speaker is not saying that they have no time, but that they did not have time in the past. The verb “would want” is used to express a future desire or wish. In this case, the speaker is not expressing a desire to do something in the past, but a desire to do something in the future.
The sentence “I wanted to do it but I had no time. I was very busy” is grammatically correct and makes sense. The speaker is expressing a desire to do something, but they are unable to do it because they do not have the time. The sentence is also consistent with the context of the question, which is about a person who wants to do something but does not have the time.