A same meaning or not problem:
There were 5 different groups of people at EuroJam . The official border colors of their main EuroJam scarves identified them .
There were 5 main groups of people at EuroJam who were identified by the different border colors of their official EuroJam scarves .
****
[A]: no

A same meaning or not problem:
Synaptic clustering refers to the addition of new spines to a dendritic area where other spines have been added by previous learning .
Synaptic clustering refers to the addition of Dendritic spines to a new area where other spines have been added through previous learning .
****
[A]: no

A same meaning or not problem:
Roger Kirk was born in Norfolk and brought up and trained in East London .
Roger Kirk was born in East London and brought up in Norfolk and educated .
****
[A]: no

A same meaning or not problem:
Mukesh ( Venugopal ) is a lead singer of the music band '' Hits Orchestra '' .
Venugopal ( Mukesh ) is a singer of the music band '' Hits Orchestra '' .
****
[A]:
yes