What does it mean when it says that General Zaroff was "singularly handsome?"

The narrator describes Zaroff's physical appearance when Rainsford first sees the general descend the marble stairs of his extravagant chateau. General Zaroff is depicted as a tall, slender, middle-aged man with white hair. The narrator mentions that Zaroff is "singularly handsome" with a "bizarre quality" about his face. General Zaroff has dark eyes with thick eyebrows, high cheekbones, a sharpcut nose, and a black mustache. Rainsford also believes that the general resembles an aristocrat. As Rainsford and General Zaroff begin to eat their meal, Zaroff slowly reveals his affinity for hunting humans, which is appalling to Rainsford. Although Zaroff is a talented, fanatical hunter, he also enjoys the finer things in life. He is an avid reader, a collector of fine wines, and he enjoys many modern amenities throughout his exclusive chateau on Ship-Trap Island. He is also relatively hospitable and courteous to Rainsford, despite the fact that he plans on hunting him. Zaroff sees himself as a Renaissance man who does not harbor "romantic ideas about the value of human life." Underneath General Zaroff's air of civility and cultured personality, he is a fanatical, malevolent murderer who enjoys hunting defenseless humans.

Explanation:

to inform readers about the ways young people improve the world.

the answer that is correct is the last option.