Which soil type cover the maximum area in

The vector of malaria is:

Insulin hormone is secreted by which of the following organ?

Which instrument is used to measure altitudes by determining the boiling point of water at a given altitude?

Which planet in our solar system has no atmosphere at all? 

Thiamine deficiency may result in:

How often do ocean tides occur in a single day due to the gravitational pull of the sun and moon?

How long does it take for sunlight to travel from the Sun to Earth? 

What element is primarily used in a Proton Fusion Engine?

What causes the permanent hardness of water?

On which day does the difference between day and night lengths reach its maximum?