about prekg admission

Hi,My son is two and half years old.Iam searching for a proper school  in chennai to put him in.My choice is either CBSE or ICSE.I have two options 1.Chettinad Vidhyashram,RApuram 2.The grove school,Alwarpet.Kindly suggest me which one is the best option.I also read in a blog that the ICSE syllabus would be banned after few years.Is it true?Please clarify.Thank you. 

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