Questions

China has been by far the biggest coal producing country over the last three decades. The country produced about 3.6 billion tonnes (Bt) of coal in 2012 accounting for over 47% of the world's total coal output.

Three Logic Levels are used and they are High, Low, HIgh impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.

Havana is the capital city of Cuba.

It's currency is Cuban Peso.

The largest district in Bangladesh is Rangamati. And smallest district is Narayangunj.

Tamil Nadu