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The correct answer is B.
Solution:
Rule 1: Every black circle will add a line in the next box of the series.
Rule 2: Every black square will remove a line from the next box of the series.
Rule 3: 1 black square will cancel the effect of 1 black circle.
This type of question is an inductive reasoning test question. Click to try a 10-question Inductive Reasoning Test or mixed aptitude test.