451: German silver is an alloy of
(a) copper, zinc and nickel
(b) copper, iron and tin
(c) iron, chromium and nickel
(d) copper, aluminium and nickel
452: Which one of the following is a man made cereal NOT found in nature?
(a) Dwarf wheat
(b) Hybrid maize
(c) Triticale
(d) Soya bean
453: Which one of the following books of ancient India has the love story of the son of the founder of Sunga dynasty?
(a) Swapnavasavadatta
(b) Malavikagnirnitra
(c) Meghadoota
(d) Ratnavali
454: A person travels 12 km due North, then 15 km due East, after that 15 km due West and then 15 km due South. How far is he from the starting points?
(A) 12 km
(B) 33 km
(C) 61 km
(D) 60 km
455: With reference to 'Astrosat', the astronomical observatory launched by India, which of the following statements is/are correct?
1. Other than USA and Russia, India is the only country to have launched a similar observatory into space.
2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth.
Select the correct answer using the code given below.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2