Which answer figure completes the form in the question figure? 

In figure completion problems, look for:
• Rotation or reflection of shapes
• Consistent movement of shaded parts
• Elements that remain unchanged
Step 1: Observe the given question figure: It is a 2 × 2 arrangement where three parts are given and one part (top-left) is missing.
Step 2: In each small square:
• The diamond with a central dot remains common.
• The black triangular portion shifts its position in a systematic manner (rotational pattern).
• The orientation of the outer lines remains consistent across the grid.
Step 3: The missing figure must:
• Contain the same diamond–dot structure.
• Have the black triangular region placed such that the rotation pattern is completed.
Step 4: Among the given options, only figure (b) correctly completes both the rotational and positional pattern.