Choose the word opposite in meaning to the given word :
HINDRANCE
a. Agreement
b. Cooperation
c. Persuasion
d. Aid

Hint: The dictionary meaning of the word "hindrance" is "something that delays any action in progress". For example, The road which is blocked is a hindrance.

Complete step by step solution:
Opposite words, also known as antonyms, are the words whose meaning is completely opposite to one another. Some opposite words can be found out by simply adding a suffix "im-" or "un-" or "non-". But for other words, we need to know the exact meaning of it and then find its antonym/opposite word. In the given question, the word is "hindrance", which means, a thing which provides resistance, delay, or obstruction to something or someone. It is a noun. It also means any obstruction that impedes or is burdensome. For example, A hindrance to the government process.
Now, as we know the exact meaning of the given word, we will go through the options, know their meanings, and then pick the best suitable answer for this question. Option 'a' is an agreement, which means, harmony or accordance in opinion or feeling. Option 'b' is cooperation, which means, the action or process of working together to the same end. Option 'c' is persuasion, which means, the action or process of persuading someone or of being persuaded to do or believe something. Option 'd' is an aid, which means, help; typically of a practical nature.
Now, by analyzing all the options, the one which seems to be the opposite of the given word "hindrance" is option 'd', "aid".

Note: You may also go through the meaning of the given options first and then check if it is opposite to the given word.