Income from royalty

Dear all, A Pvt Ltd. company has a business of manufacturing & trading an item. Also it has owned trademark of its logos & giving the rights to use those trade mark to its sister concern (Not outsider) & receiving Royalty for that. Now should I treat this royalty income as business income or other Income? If it is Other Income that can expenses on registering trademark be deduct from Royalty income under income from other source? Thanks in advance