Answer:
correct option is option D(An important natural and metallic resource is platinum)
Explanation:
Boron:
Boron is not metallic element, It is metalloid.
Carbon:
Carbon is a non metal
Chlorine:
Chlorine is also non metal
Platinum:
Platinum is a metallic element , its atomic number 78 and it is represented by symbol Pt . Platinum is an expensive metal which has high malleability and ductility.
so correct option is option D(An important natural and metallic resource is platinum)
