Itr2 or itr4s ?? which itr

Hello,

I have income from

1. Rental income from house

2 Capital gains from shares

3 FD NCD interest 

But i have done F&O trading for the first time in the last year 2014-2015 ...Which form to fill Forn ITR2 or ITR4S ?

Is simple F&O trading considered as income from profession/business ? Are there any limits etc to be considered a business ?

Thanks