Utilize the input text as a context reference, choose the right relationship between 'Lafarge' and 'cement' from the options.
Options: platform, product/material produced, location of formation, owned by

Birla Group on Monday said it was acquiring the cement business of Lafarge India for Rs.5,000 crore through a combination of internal accruals and fresh debt to add another 5.5 million tonnes in annual capacity.
product/material produced