Question

Fill in the blank with the most appropriate preposition.
Petrol is sold ________ the litre.
a) By
b) From
c) At
d) On

Answer 1

Hint: Read the given phrase/sentence carefully. Try to make out the meaning of it and find the subject or the predicate or the main object of the sentence.

Complete answer:
The given sentence conveys that the unit of petrol is litre. The given options are prepositions. Preposition a function word that typically combines with a noun phrase to form a phrase that usually expresses a modification or predication.
Now, let us examine all the given options to find out the correct option-
Option ‘a’ is By. It is an adjective which means that identifying the agent performing the action. For example Malaria is caused by mosquitoes.
Option ‘b’ is From. It is a preposition which means indicating the point in space at which a journey, motion, or action starts. For example: From my place to hers.
Option ‘c’ is At. It is a preposition that means expressing an arrival in a particular place or position. For example : They live at Conway House.
Option ‘d’ is On. It is a preposition that means to be physically in contact with or upon something. For example : She is on the table.
As we have analyzed all the given options, we can easily figure out the correct option. Here, the option to be filled in the blank is – by.

Hence, option ‘a’ is the correct option.

Note:
 All the other options are plausible distractions. You must know the meaning of all the given options to find out the correct option.