The volatility smile for equity options typically exhibits a downward slope known as a "smirk" or skew. This implies that the implied volatility for out-of-the-money (OTM) calls is lower than that of at-the-money options. As a result, the risk-neutral probability distribution for equities has a thinner right tail compared to a lognormal distribution, leading to a relatively lower price for deep OTM calls.

Conversely, the volatility smile for foreign exchange (FX) options is generally U-shaped (a true "smile"). This indicates that implied volatilities for both deep OTM puts and calls are higher than for at-the-money options. Therefore, the risk-neutral distribution for FX has fatter tails on both sides compared to a lognormal distribution, resulting in a relatively higher price for deep OTM calls.

Thus, Option B accurately describes that the ABC stock option price would be relatively low and the USD/GBP FX option price would be relatively high compared to their lognormal BSM counterparts.