Utilize the input text as a context reference, choose the right relationship between 'Microsoft Mobile' and 'smartphone' from the options.
Options: location of formation, creator, product/material produced, parent organization

Ravi Kunwar, Director – North, Microsoft Mobile Devices said, “We at Microsoft are committed to focus on enhancing user experience with our devices and with this new ‘Buyback’ offer we want to enable customers to upgrade to a smartphone that will help them be more productive and stay connected.
product/material produced