Physics
The blue colour of sky is due to

Scattering of longer wavelengths of sunlight in the atmosphere
Scattering of shorter wavelengths of sunlight in the atmosphere
Refraction of sunlight
Reflection of sunlight

ANSWER DOWNLOAD EXAMIANS APP

Physics
What is a neuron ?

Particle released during radioactivity
The anti-particle of neutron
Basic unit of nervous system
Basic unit of energy

ANSWER DOWNLOAD EXAMIANS APP