Choose the options which best expresses the meaning of the given word-
NEMESIS
a) Victory
b) Adventure
c) Reward
d) Enemy

Hint: The dictionary meaning of the word Nemesis means a punishment or defeat that somebody deserves and cannot avoid. For example: Injury, consistently his nemesis, struck him down during the match.

Complete answer:
Nemesis means something that person cannot conquer, achieve, etc. It refers to a long-standing rival; an arch enemy. For example: The performance test proved to be my nemesis.
Now we will examine the given options to find out the correct answer:
Option 'a' Victory. Victory means to win (particularly in wars). For example: King Leonidas achieved victory over Persians.
Option ‘b’ Adventure. Adventure is an experience or event that is very unusual, exciting or dangerous. For example: Our journey through the jungle was quite an adventure!
Option ‘c’ Reward. Reward means something that you are given because you have done something good, worked hard, etc. For example: Winning the matches was just reward for all efforts.
Option ‘d’ Enemy. Enemy means a person who feels hatred for, fosters harmful designs against, or engages in antagonistic activities against another. For example: I am his greatest enemy.
As we have analysed all the given options, we can figure out the answer easily. Here, the synonym/or the word which best expresses the meaning of nemesis is enemy.

Hence, option 'd' is the correct answer.

Note: Enemy is the correct answer as it suggests almost the same meaning as the given word, unlike all the other given options. You need to know the exact meaning of the given word to find out its synonym.