Sakura; yes. But you put a Zetsu clone of Tobi next to Tobi. He won't know the difference because they both have the same evil intent. (You put a Zetsu clone of Sakura, and the real Sakura next to her.
He'll know which one the Zetsu is.
He can sense Zetsu's. :|
Doesn't matter through what process he gets there, he still does.
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