From the words or group of words lettered A to D, choose the one that best completes each of the following sentences. The school boys were told to refrain.....

From the words or group of words lettered A to D, choose the one that best completes each of the following sentences.
The school boys were told to refrain...smoking

Answer Details

The appropriate option to complete the given sentence is "from." The verb "refrain" means to stop oneself from doing something. In this sentence, the phrase "to refrain" is followed by the object "smoking," which means that the school boys were told to stop themselves from smoking. Out of the given options, "from" is the only preposition that is commonly used after the verb "refrain." Therefore, the most suitable option to complete the sentence is "from."