536: Sultanates of Delhi have taken which of the following in their buildings from the ancient architecture?

(a) Mehrab

(b) Gumbaj

(c) Arched openings

(d) Decoration figures
537: Who among the following were the founders of the "Hind Mazdoor Sabha" established in 1948 ?

(a) B. Krishna Pillai, E.M.S. Namboodiripad and K.C. George
(b) Jayaprakash Narayan, Deen Day al Upadhyay and M.N. Roy
(c) C.P. Ramaswamy Iyer, K. Kamaraj and Veeresalingam Pantulu
(d) Ashok Mehta, T.S. Ramanujam and G.G. Mehta
538: What was the important reason for the fall of Vijayanagar Empire?

(a) Unity among the Muslim rulers

(b) Internal instability and weakness of Princes

(c) Moplah's rebellion

(d) Economic bankruptcy
539: Consider the following statements:

1. Purchasing Power Parity (PPP) exchange rates are calculated by comparing the prices of the same basket of goods and services in different countries.
2. In terms of PPP dollars, India is the sixth largest economy in the world.

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2
540: Consider the following statements:

1. Most of Indias external debt is owed by governmental entities.
2. All of Indias external debt is denominated in US dollars.

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2