Question

At the beginning of which century the world population was one billion? किस सदी की शुरुआत में दुनिया की आबादी एक अरब थी? *

o Twentieth Century बीसवीं सदी

o Twenty First century इक्कीसवीं सदी

o nineteenth Century उन्नीसवीं सदी

o Seventeeth century सत्रहवीं सदी​

Answer 1

Answer:

B)

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