Fill in the blank with the correct option.

One evening of each week was set apart by him for the reception _____ of chose to visit him.

whosoever

The correct answer is Option (1) → whosoever

The completed sentence is: One evening of each week was set apart by him for the reception of whosoever chose to visit him.

Whosoever (Indefinite Pronoun): Means "anyone who" or "whoever." It functions here as the subject of the dependent clause "chose to visit him."

Why the Other Options Are Incorrect: 

• Whichever (Indefinite Pronoun): Refers to a choice between a limited set of options (e.g., Whichever book you choose...). This does not fit the context of general visitors.

• Whom (Relative/Interrogative Pronoun): Is used as the object of a verb or preposition. If used, the clause would require a different structure, such as "...for the reception of those whom he chose to invite." But here, the pronoun must be the subject of the verb chose.

• Who (Relative/Interrogative Pronoun): While who is a subject pronoun, the sentence structure requires the indefinite pronoun whosoever to mean "any person who."