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:
Class : Class 6
yes and graphite is used to make pencils.
Ans 2: (Master Answer)
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.