Which of the following is true regarding a restrictive adjectival clause?
a. it will typically include the relative pronoun which.
b. it will follow a proper noun.
c. it will be set off by commas.
d. it will follow a general noun and is not set off by commas.

The correct answer is, D. It will follow a general noun and is not set off by commas. A restrictive adjectival clause (also called essential clause) is essential to the meaning of sentence because it refers to specific noun in sentence. Deleting this clause will change the meaning of the sentence. Since these are essential, the are not set off by commas. E.g. All students who have scored more than 80 percent will move to next round.

Sweetness and love, happiness etc.