Which of the following transitions in a hydrogen atom will produce radiations of minimum wavelength? 
(a) n = 2 to n = 1 
(b) n = 5 to n = 3 
(c) n = 10 to n = 5 
(d) n = 10 to n = 3 
a) n = 2 to n = 1 
b) n = 5 to n = 3 
c) n = 10 to n = 5 
d) n = 10 to n = 3