Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Current Affairs Science and Technology
The 'Kavach' system, used by the Indian Railways, is associated with which of the following?
1
Speed control of trains
2
Anti-collision testing
3
Communication between stations
4
More than one of the above
5
None of the above