Which of the following are called commercial documents as per ADS?<br>1. Certificate of insurance<br>2. Insurance declaration<br>3. Certificate of inspection of quality control<br>4. Receipt for payment of port charges<br>5. Preform invoice<br>6. Shipment advice<br>7. Export application dock challan<br>Select the correct answer

Correct Answer: 1, 2, 3, 5, 6