If the square of the sum of two numbers is equal to 4 times

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If the square of the sum of two numbers is equal to 4 times of their product, then the ratio of these numbers is :

1. 2 : 1
2. 1 : 3
3. 1 : 1
4. 1 : 2

Correct Option: C

(x + y)² = 4xy
⇒ x² + y² + 2xy – 4xy = 0
⇒ (x – y)² = 0 ⇒ x = y
⇒ x : y = 1 : 1