I. Parul is fifteenth from the left in the row. Parul is 15th from the left II. Priya is exactly in the middle and there are eight children towards her right. Priya being in the middle, there are 8 children to her right as well as to her left. So, Priya is 9th from the left. From statement I we see Parul is 15th from left. So, there are 5 children between them. Hence, 'Both I and II together are sufficient' is the correct answer.