itr 2 -schedule 112A

Advisable. To avoid any future query.

Now you can directly fill combined figures in table 4 of Schedule CG.

Read recent clarification from CBDT...

"Schedule 112A and 115AD(1)(iii) of long term capital gain are provided in the Income Tax Return software as per the Instructions to the Notified ITR form and based on taxpayer feedback. Taxpayers have an option to either enter the Scrip wise details of long term capital gains in Schedule 112A and 115AD(1)(iii) so that the correct values are populated in the CG Schedule or enter the self-calculated aggregate value of long term capital gains directly under respective items in schedule CG in terms with Sec 112A or 115AD(1)(iii) without entering scrip wise details. Taxpayers may exercise either option based on their convenience. This facility is now available in ITR-2, 3, 5 & 6 utilities." 

Yes.

But if you fill sch 112A,   column 4 of Sch CG gets auto-filled.