World Geography
Which among the following principle is used by Bats?

law of diffraction
RADAR (Radio Detective & Ranging
law of reflection
SONAR (Sound Navigation & Ranging

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

World Geography
Which among the following period in the demographic history of India is called the Period of Stable Population?

1921 to 1951
1891 to 1921
1981 to Present
1951 to 1981

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP