Let A = {2, 3, 4} and B = {8, 9, 12}. Then the number of elements… | JEE Main 2023 Mathematics PYQ

MCQMediumJEE Main 2023 · 10 April, Shift 2Relations

Let $A = \{2, 3, 4\}$ and $B = \{8, 9, 12\}$ . Then the number of elements in the relation $R = \{((a_1, b_1), (a_2, b_2)) \in (A \times B, A \times B) : a_1 \text{ divides } b_2 \text{ and } a_2 \text{ divides } b_1 \}$ is:

A
$18$
B
$24$
C
$12$
D
$36$

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