Question

A relation R is defined from {2, 3, 4, 5} to {3, 6, 7, 10} by xRy ⇔ x  is relatively prime to y. Then domain of R is

(A)  {2, 3, 5}

(B)  {3, 5}

(C)  {2, 3, 4} 

(D)  {2, 3, 4, 5}

Answer 1

Correct option  (D) {2, 3, 4, 5}

Explanation :

Given, xRy x ⇒ is relatively prime to y. 

 Therefore, domain of R = { 2,3,4,5}.