Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Knowledge World History
The technology developed to track enemy submarines in World War II was
A. RADAR
B. SONAR
C. Echolocation
D. LIDAR
1
C
2
B
3
A
4
More than one of the above
5
None of the above