Choose the correct passive form of the following sentence. 'The authorities must address these environmental issues immediately'.

• কThese environmental issues must be addressed by the authorities immediately
• খThese environmental issues are being addressed by the authorities immediately
• গThese environmental issues had to be addressed by the authorities immediately.
• ঘThese environmental issues must have been addressed by the authorities immediately

সঠিক উত্তর: ক) These environmental issues must be addressed by the authorities immediately