Which of the following is used in pencil?
ক) Silicon
খ) Graphite
গ) Charcoal
ঘ) Phosphorous
Related Questions
ক) Argentina
খ) Chile
গ) Mexico
ঘ) None of these
ক) ৩৬০°
খ) ৩০০°
গ) ১৮০°
ঘ) ৩০°
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