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SHANTANU from STELLA MARIS INTER COLLEGE, Lucknow

Subject :NSO Class : Class 5

Based on the given data about an unknown material, which of these can be the unknown material?

(A) Gold

(B) Aluminium

(D) All of these

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi

Class : Class 8

The correct answer is opt. D