666: Which one of the following groups of plants was domesticated in the New World and introduced into the 'Old World'?
(a) Tobacco, cocoa and rubber
(b) Tobacco, cotton and rubber
(c) Cotton, coffee and sugarcane
(d) Rubber, coffee and wheat
667: Consider the following pairs:
Tributary River : Main River
1. Chambal : Narmada
2. Sone : Yamuna
3. Manas : Brahmaputra
Which of the pairs given above is/are correctly matched?
(a) 1 and 2 only
(b) 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
668: Which one of the following regions of the world supplies the maximum of our imported commodities (in terms of rupee value)?
(a) Africa
(b) America
(c) Asia and Oceania
(d) Europe
669: Where are Tapovan and Vishnugarh Hydroelectric Projects located?
(a) Uttar Pradesh
(b) Madhya Pradesh
(c) Uttarakhand
(d) Rajasthan
670: Which one of the following is the largest (areawise) Lok Sabha constituency?
(a) Ladakh
(b) Kangra
(c) Kachchh
(d) Bhilwara