By congruent complement theorem ∠4 is congruent to ∠1.
According to the given question.
Angle 4 and angle 5 are complements and angle1 and angle 5 are complements.
Now, according to congruent complements theorem
"If two angles are complementary to the same angle, then these angles are congruent to each other."
Since, it is given that ∠4 and ∠5 are the complements and ∠1 and ∠5 are compliments.
⇒ ∠1 and ∠4 are complimentary to the same angle ∠5.
Therefore, by congruent complement theorem ∠4 is congruent to ∠1.
Thus option 1 is correct.
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