I am giving answer to my question.
If the stock price log returns distribution is skewed to the right, then $mode<median<mean$ in most of the cases.
The strike price of an OTM calls lies to the right of the current price. So the demand for an Out of the money calls are low as the probability that they will turn into an In the money calls is less.
As a result, volatility is lower than Black-Scholes-Merton formula assumption. So, their prices will go up. But BSM formula assumes constant volatility. So it underprice an Out of the money calls and In the money puts.