JEE Main · 2021 · 18 Mar 2021 · Shift 1 · Semiconductors

The height of each entry fixes the atmospheric layer it belongs to. The troposphere reaches up to about $12$ km, so a height of $10$ km lies within it. The stratosphere spans roughly $12$ to $50$ km and the mesosphere about $50$ to $85$ km, so $70$ km falls in the mesosphere. The thermosphere extends from about $85$ km to several hundred kilometres, so both $180$ km and $270$ km lie in the thermosphere. Matching accordingly, $10$ km pairs with the troposphere, $70$ km with the mesosphere, and $180$ km and $270$ km both with the thermosphere.