The correct option is
D Say: Let’s read the question and observe the given images.
Ask:
∙ Do you know the meaning of open shapes?
Ans: When there is a gap on any line of a shape, it is an open shape.
∙ Do you know the meaning of closed shapes?
Ans: When a shape has all its lines (straight or curved) connected end-to-end to each other without leaving any gap, we call the shape a closed shape.
Say: When a shape has all its lines (straight or curved) connected end-to-end to each other without leaving any gap, we call the shape a closed shape. Whereas if there is any gap on any of its lines, it is an open shape.
Ask:
∙ Is shape A an open or closed shape?
Ans: Open shape because all its lines are not connected to each other, leaving a gap.
∙ Is shape B an open or closed shape?
Ans: It is a closed shape because there is no gap left between the lines.
∙ Is shape C an open or closed shape?
Ans: It is also an open shape because all its lines are not connected, leaving a gap.
∙ Is shape D an open or closed shape?
Ans: It is also a closed shape because there is no gap left between the lines.
Hence, Options A and C are correct.