tapanmittal wrote: As per my understanding,it should be E.

Your understanding is correct, I think, but it's not clear what the question is asking - is it asking whether the median could change, or whether it must change? Those are very different questions.

We know the standard deviation must drop, and the mean must stay the same. The median might stay the same, or might change. We can see that by looking at sets with 4 elements for simplicity - the same will be true when you have 10 elements. If your set is symmetric (equally spaced, say), then the median will definitely not change:

0, 2, 4, 6 ---> mean and median are both 3

0, 2, 3, 4, 6 --> median is still 3

but if you invent any random set which is not symmetric, the median will almost always change:

0, 2, 4, 30 --> mean is 9, and median is 3

0, 2, 4, 9, 30 --> median goes up to 4

So the median might change, or might not. I don't know if that makes the answer B or E, because I can't guess what the question means when it says "which statistics would change". Where is the question from?