Six metallic plated each with a surface area of one side A. are placed at a distanced d from each other. The alternate plates are connected to points P and Q as shown in figure :

The capacitance of the system is :

Four metallic plates, each with a surface area of one side A, are placed at a distance d form each other. The alternating plates are connected to points A and B as shown in the figure. Then the capacitance of the system is:

Four metallic plates each with a surface area of one side A are placed at a distance d from each other. The plates are connected as shown in the circuit diagram. Then the capacitance of the system between a and b is

Four metallic plates each with a surface area A of one side and placed at a distance d from each other. the plates are connected as shown in the fig. Then the capacitance of the system between a and b is -

Four metallic plates each with a surface area A of one side and placed at a distance d from each other. the plates are connected as shown in the fig. Then the capacitance of the system between a and b is -

Four metallic plates each with a surface area of one side A are placed at a distance d from each other as shown. Then, the capacitance of the system between X and Y is