46: With reference to Bitcoins, sometimes seen in the news, which of the following statements is/are correct?
1. Bitcoins are tracked by the Central Banks of the countries.
2. Anyone with a Bitcoin address can send and receive Bitcoins from anyone else with a Bitcoin address.
3. Online payments can be sent without either side knowing the identity of the other.
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
47: UNCTAD is a United Nations Conference on:
(a) Trade and Development
(b) Military Training and Education
(c) Education and Development
(d) None of the above
48: Recently Uttar Pradesh and Madhya Pradesh governments signed a Memorandum of Understanding for the linking of two rivers as a link project. Which are these two rivers?
(a) Betwa and Chambal
(b) Betwa and Ken
(c) Chambal and Son
(d) Ken and Narmada
49: The Buddhist sect Mahayana formally came into existence during the reign of
(a) Ajatashatru
(b) Ashoka
(c) Dharmapala
(d) Kanishka
50: Assertion (A): To orbit around the Sun, the planet Mars takes lesser time than the time taken by the Earth.
Reason (R) : The diameter of the Planet Mars is less than that of the Earth.
(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