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Fill in the blanks with the most appropriate option.
If a guitar string is pulled strongly, its amplitude of vibration $..............$ and the note heard is $..............$ If it is pulled lightly, its amplitude of vibration $..............$ and the note heard is $..............$

• A
  $(i)$ Increases, $(ii)$ Louder, $(iii)$ Increases, $(iv)$ Louder.
• B
  $(i)$ Decreases, $(ii)$ Softer, $(iii)$ Decreases, $(iv)$ Softer.
• ✓
  $(i)$ Increases, $(ii)$ Louder, $(iii)$ Decreases, $(iv)$ Softer.
• D
  $(i)$ Decreases, $(ii)$ Softer, $(iii)$ Increases, $(iv)$ Louder.