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The absorption law in Boolean algebra say that

1. $X + X = X$
2. $X . X = X$
3. $X + X . Y = X$
4. None of the above

Option A & B are Basic laws of Boolean Algebra.
Option C. Absorption means to reduce
Here  x+xy=x(1+y)=x
x+xy absorbed or reduced to x
So option C is Correct Ans.
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Answer is C if we discuss according to venn diagram , x.y means a common part from both x and y whereas x is the superset so it absorps the x.y and result as x .
According to absorption law

A + AB = A

So (C) is a correct
Ans: C