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641. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Ventilators are provided near the roof.Reason (R) : Conduction takes place better near the roof.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Explanation:
642. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : A piece of iron feels hotter than that of wood in sun.Reason (R) : Iron is a better counductor of heat than wood.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Explanation:
643. Who amongst the following is credited by a Chinese pilgrim with having built the ancient city of Rajagriha, the modern Rajgir in Patna district ?
A. Udayi
B. Ajastashatru
C. Prasenajit
D. Bimbisara
Explanation:
644. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : In the manufacture of Vanaspatin the oil is only partially hydrogenated.Reason (R) : Partial hydrogenation allows the product for easy handling.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Explanation:
645. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : It is easier to roll a barrel than to pull it along.Reason (R) : The full weight of the barrel comes into play when it is pulled.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Explanation: