Answer:
The correct option is 2. The length of JG is 5 units.
Explanation:
Given information: ∠EDH ≅ ∠EDG, EH=9, EJ=4.
Corresponding sides of two triangles are congruent.
(CPCTC)
.... (1)
From the given figure it is clear that

... (2)
Using (1) and (2), we get

Subtract 4 from both the sides.


The measure of JG is 5 units, therefore the correct option is 2.