Solution

The pattern in the series is determined by the independent rotation of two elements: the three-petal figure and the curved line.

• The Three-Petal Figure: The entire group rotates 90° counter-clockwise with each step. Simultaneously, the shaded portion moves one petal clockwise within the group in each step. For the missing third figure, this means the petal group should be in the bottom-right corner with the bottom-most petal shaded.
  
• The Curved Line: The curved line also rotates 90° counter-clockwise with each step. For the missing third figure, it should move from the top-right to the top-left corner.
  

Conclusion:

The missing figure must have the petal group in the bottom-right (with the bottom petal shaded) and the curved line in the top-left. This combination matches option (c).