Answer : Option 3) Tin and Silver.
Explanation : The elements which will be malleable (thin sheets) and good conductors of electricity has to be a metal.
i) Iodine and Silver - Iodine is a non-metal and is crystalline in nature so, it cannot be malleable. Although silver is a malleable element and is a good conductor of electricity, but the combination cannot be right. Also iodine is bad conductor of electricity.
ii) Iodine and xenon - Iodine is non malleable and bad conductor of electricity, whereas xenon is a noble gas which cannot be malleable but is a good conductor of electricity.
iii) Tin and Silver- Both are metals in nature and possess the property of being malleable and good conductors of electricity.
iv) Tin and xenon - Tin is although malleable and good conductor of electricity xenon is a gas which is good conductor of electricity but cannot be malleable.