Plutonic rock
Metamorphic rock
Volcanic rock
Sedimentary rock
Jharkhand
Uttarkhand
Assam
Odisha
Total Internal Reflection
Interference
Polarization
Diffraction
Chaudhary Charan Singh
Rajendra Prasad
Jagjivan Ram
Ch. Devilal
4
5
6
7
10,000
11,000
17,508
19,500
Venezuela
Paraguay
Mexico
Brazil
The Gulf of Ob River
Yellow River
Lena River
Amazon River
Sagar Manthan
Sagar Rattan
Samudra Prahari
Sagar Prahari
24th Jan
14th Nov
24th Oct
25th Jan