1641: The fundamental objective of Panchayati Raj system is to ensure which among the following?

1. People's participation in development
2. Political accountability
3. Democratic decentralization
4. Financial mobilization

Select the correct answer using the code given below.
(a) 1, 2 and 3 only
(b) 2 and 4 only
(c) 1 and 3 only
(d) 1, 2, 3 and 4
1642: Heat from the sun is received by the earth through:

(a) Conduction

(b) Convection

(c) Radiation

(d) None of the above
1643: Six roads lead to a country. They may be indicated by letters X, Y, Z and digits 1, 2, 3. When there is storm, Y is blocked. When there are floods X, 1 and 2 will be affected. When road 1 is blocked, Z also is blocked. At a time when there are Hoods and a storm also blows, which road(s) can be used ?
(a) Z and 2
(b) Only Z
(c) Only 3
(d) Only Y
1644: Four different candles, which can last for 5 hours, 4 hours. 3 hours and 2 hours of burning, respectively, are lit in a room at the same instant and allowed to burn till such time that the three candles in the room get extinguished. The cost of burning each one of these candles is 75 paise per hour. The cost involved is:

(a) Rs. 2.75
(b) Rs. 3.75
(c) Rs. 9.75
(d) Rs. 12.50
1645: Who among the following is a famous economist?

(a) Max Muller

(b) Macaulay

(c) Gunnar Myrdal

(d) Henry Francis Carry