New Delhi, Dec. 15 -- Air quality in the national capital remained severe for the third straight day on Monday, with heavy smog engulfing parts of Delhi-NCR.

In view of the worsening pollution, GRAP-IV measures have been implemented, and offices have been directed to function at 50% capacity.

Schools, meanwhile, are not completely closed.

Here is a detailed look at whether schools are open or closed in Delhi, Noida, and Greater Noida.

In Delhi, the Directorate of Education issued a circular, calling on all government, government-aided and recognized private schools to immediately start conducting classes for children up to Class IX and Class XI in a "hybrid" mode, with both physical and online modes being available for students.

Clas...