railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Periodic Table

મેલેકાઇટ કઈ ધાતુની અયસ્ક છે?

1
મેંગેનીઝ
2
મેગ્નેશિયમ
3
મરક્યુરી
4
કોપર
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