'Logical reasoning at Klarna interview

I get this reasoning question in Klarna pre test. Please help me to solve this. Question is in image

reasoning


Solution 1:[1]

You are correct 'B' is the answer 1). Center 3 Dots , that is the 3rd column Will stay the same 2). 4th and 5th Column moves from right to left one at a time, as soon 2 black dots merged it will be come white, if the black moves it will become white again 3). Try the entire sequence filled with Numbers ( 1 to 10 ) in place of black dots to avoid confusion and solve the problem

if you have more questions, please do let me know

Solution 2:[2]

The correct Answer is B

Its because the middle column black squares remain constant while the two right columns move left. When they merge they become white. At separation restore to black.

Sources

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Solution Source
Solution 1
Solution 2 Pramisha C P

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