The only snake that builds its nest is:

• Krait
• King cobra
• Chain viper
• Saw scaled viper

Cow milk is a rich source of:

• Vitamin A
• Vitamin B
• Vitamin C
• Vitamin D

Acupuncture is a medical system of treatment in which:

• herbs are used to relieve pain
• needles are inserted into particular parts of the body to relieve pain
• surgery is done to relieve pain
• none of these

SA-node of mammalian heart is known as :

• Autoregulator
• Pace-maker
• Time controller
• Beat regulator

The element used for vulcanizing rubber is:

• sulphur
• bromine
• silicon
• phosphorus

Lens is made up of:

• pyrex glass
• flint glass
• ordinary glass
• cobalt glass

The phenomenon of light associated with the appearance of the blue Colour of the sky is:

• interference
• reflection
• refraction
• scattering

'Mirage' is an example of:

• refraction of light only
• total internal reflection of light only
• refraction and total internal reflection of light
• dispersion of light only

Which part is modified as the tusk of elephant?

• canine
• premolar
• second incisor
• molar

Which amongst the following is the largest mammal?

• elephant
• whale
• dinosaur
• rhinoceros