2616: The maturity of a river course is recognised by the presence of
(a) V-shaped valley
(b) Meanders
(c) Gorges
(d) High denudational power
2617: Which one of the following can one come across if one travels through the Strait of Malacca ?
(a) Java
(b) Singapore
(c) Bali
(d) Brunei
2618: In the context of India, which of the following principles is / are implied institutionally in the parliamentary government?
1. Member of the Cabinet are Members of the Parliament.
2. Ministers hold the office till they enjoy confidence in the Parliament.
3. Cabinet is headed by the Head of the State.
Select the correct answer using the codes given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
2619: Assertion (A) : A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km than while moving at mach number equal to 1 near the sea level.
Reason (R) : the velocity of sound depends on the temperature of the surrounding medium.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually 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
2620: In which part of India do tea and coffee plantations overlap?
(a) South India
(b) East India
(c) South East India
(d) South West India