Question

Fill in the blank with a suitable noun clause:
Yash's excuse was ___________________.

• A. not a valid one
  
• B. that he got busy at work
  
• C. one of the best so far
• D. none of the above

Answer 1

Answer: (B)

that he got busy at work

A noun clause is a dependent clause that functions as a noun. It usually begins with what, whatever, whom, that and other such relative pronouns. A noun clause can act as a subject, object, predicate nominative or object of a preposition, in a sentence.
Option B is correct as it is a that-clause that functions as a subject complement, where "Yash's excuse" is the subject. The noun clause has a subject "he" and a verb "got busy".
Option A is incorrect because it is not a noun clause, it is a phrase. (A phrase lacks a subject or a verb, or both of them.)
Similarly, option C is incorrect because it is a phrase.
Option D is incorrect because the answer lies in B.