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Subj:.....Four Blocks (S606c) 
          by Philip J. Carter and Kenneth A. Russell 
          From the book "IQ Test" on 8/15/2008
             Published by Sterling Pub. Co., Inc., 2008 
             387 Park Avenue South, New York, N.Y. 10016 
             Test #3, Problem #4, Page 49

Which set of four blocks completes
the below sequence?

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