26. Ripple tanks were used to perform a series of experiments on diffraction. The following diagrams represent the observations made. Consider the following possible conclusions: I) As wavelength increases, the amount of diffraction increases. II) As slit width increases, the amount of diffraction decreases. III) As wavelength increases, the amount of diffraction decreases. Based on these observations alone, the correct conclusions would be (a) I only (b) II only (c) III only (d) I and II only (e) II and III only