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386: Which are the materials generally employed as solder in soldering operation in elections.

(a) Iron and tin

(b) Lead and tin

(c) Aluminum and lead

(d) Aluminum and iron

387: The Balkan Plan for fragmentation of India was the brain-child of

(a) W. Churchill

(b) M. A. Jinnah

(c) Lord Mountbatten

(d) V. P. Menon
388: Roman settlement in India is found at

(a) Ujjain

(b) Kshudrakas

(c) Arikmedu

(d) Koshambi
389: Due to improper/indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste?

1. Beryllium
2. Cadmium
3. Chromium
4. Heptachlor
5. Mercury
6. Lead
7. Plutonium

Select the correct answer using codes given below.

(a) 1, 2, 3, 5 and 6 only
(b) 2, 4, 5 and 7 only
(c) 1, 3, 4, 6 and 7 only
(d) 1, 2, 3, 4, 5, 6 and 7
390: Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

(a) Isolation
(b) Mutation
(c) Natural Selection
(d) Sexual Reproduction
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