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The stamp honouring Al-Biruni came out in:

A1773
B1973
C1873
D1673
Answer & Solution
Correct answer: B. 1973
1. The stamp marked a thousand years since his birth. 2. It came out in 1973. 3. So the correct answer is 1973. _Source: syllabus Environmental Studies, 'Looking Around', Ch 6 'Every Drop Counts'_
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