NCERT Solutions for Class 9 Science Chapter 13
Important NCERT Questions
Why Do We Fall Ill
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Under which of the following conditions are you most likely to fall sick?
(a) when you are taking examinations.
(b) when you have travelled by bus and train for two days.
(c) when your friend is suffering from measles. Why?