A = {1, 2, 3, 5}, B = {4, 6, 9}. Define a relation R from A to B by R = {(x,y); the difference between x and y is odd; $x\in A,y\in B$}. Then R is

• A

  $\left\{\left(1,2\right),\left(1,6\right),\left(2,9\right),\left(3,4\right),\left(3,5\right)\right\}$

• B

  $\left\{\left(1,4\right),\left(1,6\right),\left(2,9\right),\left(3,4\right),\left(3,6\right),\left(5,4\right),\left(5,6\right)\right\}$

• C

  $\left\{\left(1,6\right),\left(1,7\right),\left(1,8\right)\left(2,9\right),\left(2,4\right),\left(2,9\right)\right\}$

• D

  $\left\{\left(1,5\right)\left(1,6\right),\left(1,7\right),\left(6,4\right)\left(6,9\right),\left(6,2\right)\right\}$