Answer:
C - Platinum
Step-by-step explanation:
Let's define the terms in the questions
STP: This means standard temperature and pressure. These are standard conditions that are ideal to measure the results of an experiment
Malleable: It means soft and easily moldable
Let’s look at the options one by one
Xenon: It’s a noble gas. Since it is a noble gas, it does not conduct electricity. So this option is incorrect
Silicon: Although Silicon is a semi-conductor, it’s hard and brittle. So, this is incorrect too
Platinum: Platinum is a shiny soft metal. Since its a metal, it is also a good conductor of heat and electricity.
Hydrogen: Hydrogen exist in form of gas at STP. Also, it is not a good conductor of heat and electricity. So, this is wrong as well.
Therefore, our correct answer is C i.e. Platinum.