Which of the following statements with regard to drone swarms is/are correct? 1. They use Terahertz band of frequency to communicate with the command centre. 2. Individual drones in the swarm can communicate with other drones in the swarm. 3. GPS Spoofing is a commonly used technique to counter drone swarm attack. Select the answer using the code given below:

Drone swarms typically use radio-frequency bands such as 2.4 GHz, 5.8 GHz, and military VHF/UHF/L-band frequencies for communication with the command centre — NOT the terahertz band, which has very high atmospheric attenuation and short range, making it unsuitable for swarm communications; hence statement 1 is incorrect. Swarm drones are designed with peer-to-peer mesh networking capability so individual drones can share data, position, and tasking with neighbouring drones autonomously, so statement 2 is correct. Counter-drone technologies commonly include RF jamming, GPS spoofing (sending false GPS signals to mislead the drones), directed-energy weapons, and net guns; GPS spoofing is indeed a commonly used soft-kill counter-drone technique, so statement 3 is correct. Hence statements 2 and 3 only are correct.