A trademark is an exclusive identity related to a product or service that differentiates it from others. A trademark could be a word, slogan, photograph, logo, graphic, etc. But due to certain reasons, trademark offices can object to any trademark application which does not meet their legal norms.
It can be due to the similarity between logo or a slogan with any existing one. It may be due to the sentiments associated with any religion. Besides these there can be many other reasons which can lead to trademark objection. If you receive any objection from another party, then you need to respond back within a month, i.e. is within 30 days. You will receive a proper legal objection letter from Trademark department. But if you still don’t take any steps or reply to it, then the Registrar has the full rights to abandon the application.