In light of the recent game Nakamura vs Anand, the second time, in the recent candidate's tournament, Anand fell into Nakamura's opening preparation trap out of the reversed sicilian.
If he [Anand] had realized that he was falling into an opening trap, or opening preparation, is there any possible thing that he could have done to avoid his loss?
I ask this question to better understand how to respond to obvious opening traps out of really obscure lines, and even traps out of reasonable looking lines.