PSC Exam Question - Choose the figure which is different from the rest

Introduction - PSC IQ Question

General intellectual examination is also one of the first step taken by the Public Service Commission. This is especially not a matter of rhetoric or confusion. How smart is the researcher's main objective?
Any type of solution can give you a sense of satisfaction. It is often asked for all the examination and field examination. Here are the main things in it.

1) literally logical test:
 Intellect, speech, sequence, equality, classification, coding - decoding, left letter Direction and distance knowledge test, logical analysis, classicism, statement and reason, arrival, inhibition, work-stage, etc.

2) Quantitative (numerical or numerical) logical test:
Sequence (syllabus), homogeneous, classification, coding, excluding letter-signs, shared attributes, metrics, factual interpretation check (root), arithmetic logic, percentage, percentage Decimal, proportion, medicine, profit, nokshan, friendship, characters, time and work etc.

3) Nonverbal logical testing

Sequence, homogeneity, assimilation, classification, logical graphical analysis, texture diagram, metrics picture, triangle and class composition, picture or shape texture analysis, point placement, water Viewed figure, Anima watches, shape texture and analysis, point of view, position, see water Eye-catching, anamas sighting, inherent shape, picture transfers, etc.

Answer: Right Answer is Option (D) 
Reason: Each one of the figures, except fig. (4), is formed by three line segments.