Which of the following statements are CORRECT?

If it takes exactly $3$n$2+2$n$+1$ operations to compute something, we can say that the time complexity of the method is O$($n$2).$

If a method always takes exactly $10$ minutes to compute something, we would say that it has time complexity O$(10$ mins$).$

We can say $(3$n$2+17)$ is in O$($n$2)$ and we would never say $(3$n$2+17)=$ O$($n$2).$

Question $4$Select one:

I only.

II only.

III only.

I and III.

I and II$.$

II and III.

I, II and III.

none of the above