What is the relationship between 'Sun Pharmaceutical' and 'Ranbaxy Laboratories' in the context of the input sentence.
Options: owned by, parent organization, operator, subsidiary

MUMBAI, Sept 10 (Reuters) - Sun Pharmaceutical Industries Ltd, India's largest drugmaker by sales, said it is looking to divest a manufacturing plant in Ireland as it tries to control costs that have spiralled since it bought Ranbaxy Laboratories Ltd.
subsidiary