1463Civil EngineeringMedium
Assertion A : When rock conditions are favorable, it will not be necessary to take up concrete lining concurrently with the driving operations till the full length of the tunnel has been driven through rock. Reason R : A tunnel through rock, hard or soft, does not need any concrete lining________?
AA is false but R is true
BBoth A and R are true but R is not the correct explanation of A
CBoth A and R are true and R is the correct explanation of A
DA is true but R is false
Correct answer
D. A is true but R is false
Explanation
The correct answer is A is true but R is false.