Doubt in logic of code

#1

https://practice.geeksforgeeks.org/problems/flood-fill-algorithm1856/1/?category[]=Matrix&category[]=Matrix&problemStatus=unsolved&page=2&query=category[]MatrixproblemStatusunsolvedpage2category[]Matrix#

In the solution, if I remove the comment and activate the statement, the code works. But my doubt is, why is the commented piece of code even necessary. If image[sr][sc]==newColor, it will not be equal to b and hence the previous if statement should take care of it.

#2

check your previous doubt have replied on it.

#3

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