Question

Choose the best option-
An event that happens once in two years.
a) Biannual
b) By-annual
c) Biennial
d) Two-annual

Answer 1

Hint: This is a one-word substitution and this is used when a phrase needs to be replaced with a single word. This is very useful for writers, especially.

Complete answer:
An event that happens once in two years is something that occurs only one time, in two years. There is a single word for this phrase, used to express a similar meaning, but by using only one word. In the given question we are asked to give one word for this phrase.
Now, let us examine all the given options to find out the correct answer :
Option ‘a’ is Biannual. It is an adjective which means (something) that is occurring twice or something that happens once in two years. Some people prefer to use semi-annual to something that occurs twice in a year, reserving biannual for something that occurs in two years.
Option ‘b’ is By-annual. This is not a word and doesn’t exist in the dictionary. It has no meaning. So we will eliminate this option straight away.
Option ‘c' is Biennial. It is an adjective which means (something) taking place every other year. This is also not related to the given phrase.
Option ‘d’ is Two-annual. This is not related to the given phrase, as it is quite opposite in meaning.
As we have analyzed all the given options, we can easily figure out the correct answer. Here, one word for the given phrase is – Biannual. Hence, the option ‘a’ is the correct option.

Note:
All other options are plausible distractions. You must know the meaning of all the given options to find out the correct answer. The other options may sound similar to the answer but are not the answer.