Cow milk is a rich source of____________?
Cow milk is a rich source of____________?
A. vitamin C
B. vitamin B
C. vitamin A
D. vitamin K
Cow milk is a rich source of____________?
A. vitamin C
B. vitamin B
C. vitamin A
D. vitamin K
A. Reflection
B. Total internal reflection
C. Refraction
D. None of these
who invented bulb?
A. Philips
B. Robert
C. Edison
D. Willium
A. Nitrogen
B. Hydrogen
C. Nickle
D. Oxygen
A. NH
B. NH2
C. NH3
D. NH4
A. 1492
B. 1609
C. 1212
D. 1743