Adoption of accounts in board meeting

Yes,

Refer to Circular No. 28/2011  of MCA.

More specifically, There is no specific provision as to any item for
which the physical presence of Director is required.
However the company might provide for certain items to be
taken up in the physical presence of the Directors only such
as approval of annual accounts, further issue of share
capital, signing of prospectus, borrowings, investment etc.

Hence it is at the discretion of the company.

Regards