Directions: In these questions, a part of the sentence is given in bold. Below are given alternatives to the bold part at 1, 2 and 3 which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (4).

प्र:

Birds sit on the boughs of trees in my garden and with their sweet notes fill the air with music.

• 1
  by their sweet notes fill the air
• 2
  fill the air by their sweet notes
• 3
  fill their sweet notes in the air
• 4
  No improvement