411: Consider the following factors:
1. Rotation of the Earth
2. Air pressure and wind
3. Density of ocean water
4. Revolution of the Earth
Which of the above factors influence the ocean currents?
(a) 1 and 2 only
(b) 1, 2 and 3
(c) 1 and 4
(d) 2, 3 and 4
412: Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die?
(a) Edwin Hubble
(b) S. Chandrashekhar
(c) Steven Weinberg
(d) Stephen Hawking
413: In how many different ways can four books A, B, C and D be arranged one above another in a vertical order such that the books A and B are never in continuous position?
(a) 9
(b) 12
(c) 18
(d) 14
414: Which of the following countries share borders with Moldova?
1. Ukraine
2. Romania
3. Belarus
Select the correct answer using the code given below:
(a) 1 and 3 only
(b) 1 and 2 only
(c) 1, 2 and 3
(d) 2 and 3 only
415: White paper is a:
(a) Paper of good quality
(b) Paper having white colour
(c) Document published by the government on matters of national importance
(d) Paper used for bearer bonds