Choose the correct option:
1. There is a debate between students of physics (A) and chemistry (B). Team A is arguing about elements, while B is arguing about compounds. You are a part of team A, so help your team to find out the element among the following.
2. Priya's teacher taught her about metal and non-metals. She is familiar with their properties. There is one group of elements that behave both like metals and non-metals. Among the given options, which one do you think it is?