This page is a list of heirs to the throne of Luxembourg. The list includes all individuals who were considered to inherit the throne of Luxembourg, either as heir apparent or as heir presumptive, since the constitution of the Grand Duchy of Luxembourg on 15 March 1815. Those who actually succeeded as Grand Duke or Grand Duchess of Luxembourg are shown in bold.

Based on that paragraph can we conclude that this sentence is true?
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Available options:
I. Yes
II. It's impossible to say
III. No
II.