The intensity of X-rays form a Coolidge tube is plotted against wavelength `lambda` as shown in the figure. The minimum wavelength found is `lambda_c` and the wavelength of the `K_(alpha)` line is `lambda_k`. As the accelerating voltage is increased
(a) `lambda_k - lambda_c` increases (b) `lambda_k - lambda_c` decreases
(c ) `lambda_k` increases (d) `lambda_k` decreases
A. `(lamda_(K)-lamda_(C))` increases
B. `(lamda_(K)-lamda_(C))` decreases
C. `lamda_(K)` increases
D. `lamda_(K)` decreases
