Under which of the following conditions are you most likely to fall sick ?
(i) when you are taking examinations,
(ii)when you have travelled by bus and train for two days,
(iii) when your friend is suffering from measles. Why ?

Under which of the following conditions is a person most likely to fall sick ? when she is recovering from malaria. (ii) when she has recovered from malaria and is taking care of someone suffering from chicken-pox. (iii) when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox. Why ?

Explain Why:- An antacid tablet is taken when you suffer from acidity.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : the drift velocity of electrons in a conductor is very small, when its two ends are connected to a battery. Reason : It is because, as the electrons accelerated , they get scattered or defleted on suffering collisions against the positive ions in the conductor