An infinitive phrase is a group of words introduced by "an infinitive", This group of words may function as a noun, adjective or adverb. In the following example the infinitive phrase is working as an adjective, since it modifies the noun "topic".
<em>The best </em><u><em>topic</em></u><em> </em><u><em>to write about</em></u><em> </em><em>is one you know well.</em>
<em> noun infinitive phrase</em>
The meaning of the word alleged is (of an
incident or a person) said, without proof, to have taken place or to have a
specified illegal or undesirable quality. So among the choices alleged is
something similar to word suspected.so the answer is a
