Kindly appreciate- the funda of Special or Ordinary business is that to judge whether a business is special or ordinary you must look in to the relevant section i.e. whether it is required to be passed by Special or ordinary resolution.
Whether a business is special or ordinary is not dependant on passing majority. To elaborate further only 4 business as mentioned in section 173 (1)(a) are ordinary business and rest all the businesses u/s 173(1)(b) are special businesses whether they are required to be passed by Special or ordinary resolution.
For example Alteration of Article is required to be passed by Special Resolution u/s 31 but it is an ordinary business.
Similarily appointment of auditor u/s 224 or approval of balance sheet in AGM u/s 209 by shareholders is to be done by ordinary resolution but still they are special business read with section 173.
So if a business is a special business than explanatory statement is required to be attached u/s 173 with the notice of general meeting. Likewise nothing is required to be attached with an ordinary business.
For exam I’d like to suggest you one thing that mention the funda straight away to show your knowledge and mention the format with short explanatory note u/s 173.