To which neighbouring country does India share the longest land border ?

Consider the following statements;
Assertion (A): The floods can be reduced by construction of dams and reservoirs:
Reason (R) : Dams have the capacity of holding huge quantity of water during flood period.
Now select your answer according to the coding scheme given below:

Which one of the following is correctly matched ?

Sathanur Dam is constructed across which river ?

Which one of the following is a major source of irrigation in Tamil Nadu in general?

Which of the following is called the Ganga of South India?

Richter scale, a logarithmic scale to measure earthquake was devised by

Seismic waves are recorded with the help of an instrument known as

Tamil Nadu is a major producer of

Skeletal soils are found in