Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select “No substitution”.The musicians were balancing up their instruments.

The correct answer is 'tuning up'. The most appropriate option to substitute the UNDERLINED segment in the given sentence is 'tuning up'.Here, 'tune (sth) up' is a phrasal verb. If musicians who are preparing to play tune up their instruments, they make small changes to them so that they produce the correct notes. Example: After the orchestra had tuned up, the CONDUCTOR walked on to the stage.Therefore, as per the points mentioned above, we find that the correct answer is Option 3. ​Correct Sentence: The musicians were tuning up their instruments. Let's look at the meaning and EXAMPLES of some idioms of the word 'Play':IdiomMeaningExampleplay (merry) hell with sthto seriously damage or confuse somethingThe power cuts played hell with our computers.play (sth) by earto play a piece of music by REMEMBERING the notesHe did not need sheet music. He could play the piece by ear.play a joke/trick on sbto confuse someone or CAUSE a problem for themFate played a cruel trick on him when he was injured in his first game.