2166: Which one of the following agricultural practices is eco-friendly ?

(a) Organic farming
(b) Shifting cultivation
(c) Cultivation of high-yielding varieties
(d) Growing plants in glass-houses
2167: The thermoregulatory centre of the man body is

(a) Pituitary

(b) Skin

(c) Hypothalamus

(d) Thyroid
2168: Consider the following statements:

1. During the process of osmosis, the solvent travels from concentrated solution to the diluted solution.

2. In the reverse osmosis, external pressure is applied to the dilute solution.

Which of the following statements given above is/are correct?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
2169: Which one of the following is a fast growing tree?

(a) Teak

(b) Eucalyptus

(c) Banyan

(d) Coconut
2170: What is the correct chronological order in which the following appeared in India ?

I. Gold coins

II. Punch-marked silver coins

III. Iron plough

IV. Urban culture

Select the correct answer using the codes given below :

Codes :

(a) III, IV, I, II
(b) III, IV, II, I
(c) IV, III, I, II
(d) IV, III, II, I