Q. Assertion: Good conductors of heat are also good conductors of electricity and vice versa.
Reason: Mainly electrons are responsible for these conductions.

 2306  224 AIIMSAIIMS 2000Current Electricity Report Error

Solution:

The air surrounding the fire becomes hot and its density decreases. That’s why this less dense air rises up and the cold air comes down. So below the fire, only cold air can be present.