'Road Block' is done in terrorist affected areas. Which of the following principles should be followed in it ? 1. It should make it difficult for the terrorists to turn back 2. Adequate troops should be kept in the open 3. Manning of road block should be done as per traffic movement 4. Proper communication be set up, audible to all nearby personnel Select the correct answer using the code given below :

Statement 1 is correct: A key objective of a road block is to prevent the movement of suspects, including making it difficult for them to turn back and escape. Statement 2 is incorrect: Adequate troops should be concealed or in covered positions, not kept in the open, to protect them from hostile fire and maintain tactical surprise. Statement 3 is incorrect: While traffic management might be necessary, the primary manning of a road block in a terrorist area is determined by security requirements, threat assessment, and the need to effectively screen vehicles/personnel, not primarily by normal traffic movement patterns. Statement 4 is incorrect: Communication is vital, but it should be secure (e.g., via radio) and discreet, not audible to all nearby personnel, which could alert the terrorists to the presence and actions of the security forces.