The metal, which is a constituent of vitamin B12 is____________?
A. Iron
B. Magnesium
C. Zinc
D. Cobalt
Everyday Science Mcqs EDS Mcqs Most Important. These Everyday Science Mcqs are collected from previous Past papers of all testing agencies. Everyday Science Mcqs are divided into sub-categories which make it easy cover all everyday science mcqs topic wise.

A. Iron
B. Magnesium
C. Zinc
D. Cobalt
A. Pyrex glass
B. jena glass
C. Flintglass
D. Soft glass
A. Nitrogen gas
B. Carbon dioxide
C. Oxygen
D. Hydrogen
A. Refraction
B. Light scattering
C. Reflection
D. Interference