426: The Vitamin responsible for anti-sterile activity is:
(a) Vitamin A
(b) Vitamin B
(c) Vitamin E
(d) Vitamin D
427: Which of the following are among the million plus cities in India on the basis of data of the Census, 2001 ?
1. Ludhiana
2. Kochi
3. Surat
4. Nagpur
Select the correct answer using the code given below
(a) 1 and 4 only
(b) 2, 3 and 4 only
(c) 1, 2 and 3 only
(d) 1, 2, 3 and 4
428: Which of the following is the correct order of increasing size of the grains of soil particles?
(A) Clay
(B) Silt
(C) Sand
(D) Gravel
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(a) A, B, C, D
(b) D, C, A, B
(c) B, C, A, D
(d) C, D, B, A
429: Who is the scientist in whose honour the Chandra X-ray telescope has been named ?
(a) Chandrasekhar Venkat Raman
(b) Jagdish Chandra Bose
(c) Prafulla Chandra Roy
(d) Subrahmanyan Chandrasekhar
430: Consider the following statements with reference to the Periodic Table of chemical elements :
I. lonisation potential gradually decreases along a period.
II. In a group of elements, electron affinity decreases as the atomic weight increases.
III. In a given period, electronegativity decreases as the atomic number increases.
Which of these statement(s) is/are correct ?
(a) I only
(b) II only
(c) I and III
(d) II and III