Subject :Biology Class : Class 7
In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as
Assertion : Organic impurities of sewage include human and animal excreta, urea (of urine), oil etc.
Reason : Inorganic impurities of sewage include micro-organisms that cause water-borne diseases.
A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If both assertion and reason are false.