In which of the following cases, the Supreme Court has held that while applying and interpreting the anti defection law, the Speaker of Lok-Sabha functions as a tribunal:

A. S.P. Sampath Kumar V/s Union of India (1987)

B. I.R. Coelho V/s State of Tamilnadu (2007),

C. Kihota Hollohon V/s Zachilhu (1992),

D. L. Chandra Kumar V/s Union of India (1997),

E. M.S.M. Sharma V/s Shri Krishna Sharma (1959)

Choose the most appropriate answer from the options given below: