Question: Use the magic power to cast a spell

  1. `new MagicPower().castSpell("expecto patronum")`
  2. `MagicPower magicPower = new MagicPower();`
  3. `MagicPower.castSpell("expelliarmus");`
  4. `new MagicPower.castSpell();`

Answer: The correct answer of the above question is Option A:`new MagicPower().castSpell("expecto patronum")`