Consider the following statements about Kavach, the automatic train protection system:
1. It is designed and developed by Research Design and Standard Organisation (RDSO) in collaboration with Railway Technical Research Institute (RTRI), Japan
2. The trials of Kavach were facilitated by the Southern Railway
3. Kavach is a state-of-the-art electronic system with Safety Integrity Level-4 (SIL-4)
Which of the statements given above is/are correct?
1
1 only
2
3 only
3
1 and 2 only
4
1, 2 and 3