1946: Protective action against harmful household insects and pests can be taken by the use of

(a) Infrasonic waves

(b) Microwaves

(c) Ultrasonic waves

(d) Low frequency radio waves
1947: Farm land tends to erode most rapidly when planted with

(a) sorghum

(b) potato

(c) wheat

(d) clover
1948: At which stage in its life-cycle does the silkworm yield the fibre of commerce?

(a) Egg
(b) Larva
(c) Pupa
(d) Imago
1949: With reference to 'Eco-Sensitive Zones', which of the following statements is/are correct?

1. Eco-Sensitive Zones are the areas that are declared under the Wildlife (Protection) Act, 1972.
2. The purpose of the declaration of Eco-Sensitive Zones is to prohibit all kinds of human activities in those zones except agriculture.

Select the correct answer using the code given below.

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
1950: Match List I with List II and select the correct answer by using the code given below the lists :

List I

I. Gupta
II. Chandella
III. Chalukya
IV. Pallava

List II

(A) Badami
(B) Panamalai
(C) Khajuraho
(D) Deogarh

Codes:

(a) I-D, II-C, III-A, IV-B
(b) I-D, II-B, III-C, IV-A
(c) I-B, II-C, III-D, IV-A
(d) I-C, II-D, III-A, IV-B