4201: Which of the following is/are used as biofertilizers ?
I. Azolla
II. Blue-green algae
III. Alfalfa.
Select the correct answer using the codes given below.
Codes:
(a) II alone
(b) I and II
(c) I and III
(d) I, II and III
4202: Atmospheric temperature increases at the higher altitudes due to:
(a) Convection
(b) Radiation
(c) Conduction
(d) Inversion
4203: What is Rio+20 Conference, often mentioned in the news?
(a) It is the United Nations Conference on Sustainable Development
(b) It is a Ministerial Meeting of the World Trade Organization
(c) It is a Conference of the Inter-governmental Panel on Climate Change
(d) It is a Conference of the Member Countries of the Convention on Biological Diversity
4204: Consider the following statements :
An amendment of the Constitution of India can be initiated by the
I. Lok Sabha.
II. Rajya Sabha.
III. State Legislatures.
IV. President.
Which of the above statements is/are correct ?
(a) I alone
(b) I, II and III
(c) II, III and IV
(d) I and II
4205: Assertion (A) :
Phenyl is used as a household germicide.
Reason (R):
Phenyl is a phenol derivative and phenol is an effective germicide.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is NOT a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true