4161: Which one of the following is useful for biological control of pests?
(a) Honey bees and locusts
(b) Scorpions and spiders
(c) Wasps and birds
(d) Parrots and kites
4162: What is the increasing order of the wavelengths of the following colours?
1. Orange
2. Indigo
3. Yellow
4. Violet
(a) 1, 2, 3 and 4
(b) 3, 1, 4 and 2
(c) 1, 3, 2 and 4
(d) 4, 2, 3 and 1
4163: A common currency for the members of the Common Market in Europe is known as
(a) Dollar
(b) Eurodollar
(c) Franc
(d) Pound
4164: Consider the following statements:
1. The joint sitting of the two houses of the Parliament in India is sanctioned under Article 108 of the Constitution
2. The first joint sitting of Lok Sabha and Rajya Sabha was held in the year 1961
3. The second joint sitting of the two Houses of Indian Parliament was held to pass the Banking Service Commission (Repeal) Bill
Which of these statements are correct?
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
4165: The temperature for pasteurisation of milk is selected so as to:
(a) Kill the micro organisms
(b) Kill all bacteria
(c) Store it for long time without coagulation
(d) Kill the micro organisms and other harmful bacteria