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World population reached roughly what figure by the year 2000?

A9 billion
B6 billion
C2 billion
D8 billion
Answer & Solution
Correct answer: B. 6 billion
1. It stood at about 2 billion in 1900. 2. It reached 7.2 billion in 2011. 3. By 2000 it was about 6 billion. _Source: syllabus Biology, 'Reproductive Health'_
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