Correct Answer:

Solution : According to the question figure –
1. In the given series, the triangle at the top right is moving up and down with alternately black and white.
2. The small circles move from top to middle and bottom along the left side.
3. The circle given at the centre moves from middle to bottom, bottom to center, and to the top of the box.
Thus, the missing part of the figure is alternated to –

Therefore, the complete figure is as follows –

Hence, the third option is correct.