Which of the following statement is correct ?

A Gullappalli Nageswara Rao Vs. State of AP, is about bias

B K.L. Tripathi Vs. State Bank of India, is about right of cross examination

C General Medical Council Vs. Spaekmen, is about irrelevance of principles of natural justice; if in reaching a decision, the principles make no difference

D N. Kalindi Vs. Tata Locomotives, is about the right of representation by a lawyer being considered to be a part of natural justice and it can be claimed as of right.