If a ruler cannot be tried but a citizen can be tried which test fails?

Correct answer: Test of equality before law

Direct answer: B, the test of equality before law. In a democracy governed by law, rulers do not possess unlimited personal immunity. Reasoning: a ruler and an ordinary citizen may both be accused of an offence; the law should provide a fair process for examining either case; if the ruler cannot be tried while the citizen can, the same legal standard is not being applied. This shows unequal accountability and failure of equality before law. Option A, campaign test, concerns election persuasion and does not measure legal accountability. Option B is correct because it directly asks whether rulers and citizens are equally subject to law. Option C, polling-booth test, concerns access to voting facilities. Option D, counting test, concerns accuracy of election results. Those election-related matters do not address immunity from trial. Equality before law does not mean guilt is presumed; it means everyone, including leaders, receives a fair legal process. Memory cue: in rule of law, no ruler is above the law.