What is the minimum distance (in metres) required to hear an echo?
10 m
13 m
17 m
21 m
C.
17 m
Anaemia is caused because of deficiency of which of the following?
Cobalt
Iron
Sodium
Calcium
Why does a blackboard appears black in colour?
It reflects black colour
It absorbs black colour
It reflects all colours
It absorbs all the colours
Which one among the following is a main system board of a computer?
C.P.U.
Keyboard
Microship
Motherboard
What is dry ice?
Solid Carbon dioxide
Solid Nitrogen dioxide
Solid Sulphur dioxide
Solid Water
Which of the following represents the most complex trophic level?
Community
Population
Eco-system
Species
Chief Minister of Andhra Pradesh launched a medical scheme for A.P.L. families. What is the name of that scheme?
Haritha Kalyanam
Arogya Raksha
Kalvyanamsurvay
Swasthya Raksha