16: 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
17: Who amongst the following was the Chairman of ISRO when INSAT-3B was launched ?
(a) Anil Kakodkar
(b) Abdul Kalam
(c) K. Kasturirangan
(d) U. R. Rao
18: In eye donation, which one of the following parts of donor's eye is utilised ?
(a) Iris
(b) Lens
(c) Cornea
(d) Retina
19: Which one of the following plants can fix nitrogen from air?
(a) Rice
(b) Wheat
(c) Pea
(d) Maize
20: Regarding the atom of a chemical element, the magnetic quantum number refers to
(a) orientation
(b) shape
(c) size
(d) spin