For balmer series in the spectrum of atomic hydrogen the wave number of each line is given by `bar(V) = R[(1)/(n_(1)^(2))-(1)/(n_(2)^(2))]` where `R_(H)` is a constant and `n_(1)` and `n_(2)` are integers. Which of the following statements (s), is (are correct)
1. As wave length decreases the lines in the series converge
2. The integer `n_(1)` is equal to 2.
3. The ionisation energy of hydrogen can be calculated from the wave numbers of three lines.
4. The line of shortest wavelength corresponds to = 3.
A. 1,2 and 3
B. 2,3 and 4
C. 1,2 and 4
D. 2 and 4
