Find the odd figure.

All other designs have been made of three line segments whereas figure (4) has been made up of four line segments.

As we can see that
Except figure (4), in all other figures the two line segments form an acute angle.

Except figure (4) all others have been divided into four equal parts.

Except in figure (4), in all other figures there are two intersecting quadrilaterals.

Except in figure (1) , all other figures the arrow points towards open side.

Except in figure (4), in all other figures only two types of designs are given.

As we can see that figure (3) is different from the other three.
The lower line segment is inverted in figure (3).

As we can see that,
Except in figure (3), in all other figures all the four designs face the same direction.

Except figure (1) all others are irregular.
Figure (1) is a regular pentagon.So figure ( 1 ) is correct answer .

In the rest of the three, the slanting lines are in the same direction, but in option (1) the direction of slanting lines is in the opposite order.