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Sayan Duary from Vidyasagar Shishu Niketan, Paschim Medinipur
Subject :NSO    Class : Class 3

Read the given conversation.



Which of the these statements is correct?

AX is ruby and Z is tungsten.
BY is granite and Z is quartz.
CX is diamond and Y is silica.
DY is graphite and Z is tungsten.


Ans D is wrong.

Ans 1:

Sarthak Shome from Harvest International, Bangalore
Class : Class 7
yes and graphite is used to make pencils.

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

Diamond is the hardest rock used to cut glass. Graphite is used for making lead of pencils. Tungsten is used to make the filament of the light bulbs. Hence, the right answer is option D.


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