4171: The escape velocity from the earth's surface is about:
(a) 30 km/sec
(b) 6 km/sec
(c) 11.2 km/sec
(d) 300 km/sec
4172: Which of the following pairs is not correctly matched?
(a) Reinhold Messner : Computer Technology
(b) Harlow Shapley : Astronomy
(c) Gregor Mendel : Hereditary Theory
(d) Godfrey Hounsfield : CT Scan
4173: Assertion (A):
For the first time, India had no trade deficit in the year 2002- 2003.
Reason (R):
For the first time, India's exports crossed worth $ 50 billion in the year 2002-03.
(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
4174: The Vitamin containing cobalt is
(a) B1
(b) B2
(c) B6
(d) B12
4175: Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning?
1. Smelting units
2. Pens and pencils
3. Paints
4. Hair oils and cosmetics
Select the correct answer using the codes given below :
(a) 1, 2 and 3 only
(b) 1 and 3 only
(c) 2 and 4 only
(d) 1, 2, 3 and 4