A same meaning or not problem:
His troops , however , were enough to prevent a Serbian invasion , and he introduced the Serbian delegation that negotiated with the Bulgarian king , Stefan Decanski .
However his troops were enough to prevent a Serbian invasion and he led the Serbian delegation which negotiated with the Bulgarian King Stefan Decanski .
****
[A]: yes

A same meaning or not problem:
He has Indigo dark blue fur and has a blue rain cloud with raindrops and hearts as his belly symbol .
He has dark blue fur Indigo and has a blue cloud of rain with raindrops and hearts as his abdominal symbol .
****
[A]: yes

A same meaning or not problem:
The main coach of the aviators was Carl Carl Caldwell , and the general manager was Mike McCoy .
Carl Caldwell was the head coach of the Aviators , and Mike McCoy was the General Manager .
****
[A]: yes

A same meaning or not problem:
The Bank of the People was founded in 1835 in Toronto by radical reform politicians James Lesslie , James Hervey Price and Dr. John Rolph .
The Bank of the People was created by radical Reform politicians James Lesslie , James Hervey Price , and Dr John Rolph in Toronto in 1835 .
****
[A]:
yes