The correct answer is A. mischievous.
Mischievous means playful in a way that is likely to cause harm or annoyance. It is often used to describe children who are playing pranks or being naughty.
Lavish means spending or using money or resources in an extravagant or wasteful way. It is often used to describe people who are very rich and spend their money on expensive things.
Seraphic means
having a look of great happiness or joy. It is often used to describe angels or other religious figures.Azure means of a deep blue color. It is often used to
describe the sky or the ocean.In the sentence “His diabolical ways made him unpopular,” the word “diabolical” means evil or wicked. This suggests that the person in question was doing things that were harmful or harmful to others. The word “mischievous” is the closest match to this meaning, as it suggests that the person was doing things that were playful but also likely to cause harm or annoyance. The other options do not match the meaning of the sentence as well.