Ans Option A $\large \Theta (n)$
Bcz we need to check elements in array sequentially upto last level -1 of min heap for min heap property .
Which contains asymptotically (n/2) elements so
i.e . array representation of min heap
4,6,10,7,9,15,11. Size= 7
We have to check heap property upto last level-1 so aymptotically $\large \Theta (n/2) $ is equals to $ \large \Theta (n) $
$ \large \Theta (n) $ is ans.