Final answer:
The Neverseen leaders are the only known telepaths capable of bypassing Sophie's mind-blocking abilities in the Keeper of the Lost Cities series.
Step-by-step explanation:
The only telepaths who can slip past Sophie's blocking are d) The Neverseen leaders. Sophie, a character from the Keeper of the Lost Cities series, has the ability to block her mind from other telepaths. Specific individuals, namely the leaders of the Neverseen, an antagonist group in the series, have demonstrated the ability to penetrate her defenses. This skill set is unique to them, as they possess abilities and knowledge that allow them to bypass the mental blocks established by incredibly skilled telepaths such as Sophie.