Which is an example of a noun clause? a) that no one else liked b) which was under the bed c) that the tide is turning d) who didn't do their homework

Firstly it would be important to define noun clause in order to select one. 
It is "a dependent (or subordinate clause) that works as a noun. It can be the subject of a sentence, an object, or a compliment" it purpose might be "to name a person, place, thing, or idea"

It would say that the correct answer is C because it follows the rules to make a noun clause. It is introduced by that follow by a subject and its corresponding verb. 
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