181: Which of the following professional (s) are more likely to run the risk of a permanent change in their cell's DNA ?
I. Researchers using carbon-14 isotope
II. X-ray technician
III. Coal miner
IV. Dyer and Painter
Select the correct answer by using the codes given below :
(a) II alone
(b) I, II and III
(c) I, II and IV
(d) I, III and IV
182: Assertion (A)
The Congress Ministries in all the provinces resigned in the year 1939.
Reason (R)
The Congress did not accept the decision of the Viceroy to declare war against Germany in the context of the Second World War.
(a) Both A and R are 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
183: The Harappans did not know the use of
(a) Bronze
(b) Gold
(c) Iron
(d) Silver
184: The standard time of the following countries is ahead or behind Greenwich Mean Time depending on whether they are east or west of the longitude passing through Greenwich :
I. Cuba
II. Greece
III. Iraq
IV. Costa Rica
V. Japan
Which one of the following sequential orders gives the correct arrangement of the countries according to their standard time from ahead to behind GMT?
(a) V, III, II, I, IV
(b) II, IV, I, III, V
(c) IV, I, III, II, V
(d) III, V, IV, I, II
185: Which of the following statements are correct about the deposits of methane hydrate?
1. Global warming might trigger the release of methane gas from these deposits.
2. Large deposits of methane hydrate are found in Arctic Tundra and under the seafloor.
3. Methane in atmosphere oxidizes to carbon dioxide after a decade or two.
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3