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Let $X = \{2, 3, 6, 12, 24\}$, Let $\leq$ be the partial order defined by $X \leq Y$ if $x$ divides $y$. Number of edges in the Hasse diagram of $(X, \leq)$ is

1. 3
2. 4
3. 9
4. None of the above

Hasse Diagram is:

24
/
12
/
6
/   \
2    3
selected

We don't represent transitive edges in Hasse diagram.

24

/

12

/

6

/      \

2        3

Now u can count number of edges will be 4.