Question

Which among the following shows metallic character ?
B, Ga, In, Tl

• A. only B
  
• B. Only Tl
• C. All B, Ga, In, Tl
• D. Ga, In, Tl

Answer 1

The correct option is D Ga, In, Tl

B is a typical non-metal, Al is a metal but shows many chemical similarities to boron.
Ga, In and Tl are almost exclusively metallic in character.