Researchers have announced that the magnetic fields emitted by one manufacturer's security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interactions can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
a) same
b) of which, worldwide, there are 200000 of that type, and which can interfere with pacemakers, and
c) 200000 of which type exist worldwide, interfering with pacemakers, and
d) 200,000 of that type exist worldwide and can interfere with pacemakers, and
I picked choice A as it is parallel and with no error compared with other choice.
Please suggest which should be the write answer..
a) same
b) of which, worldwide, there are 200000 of that type, and which can interfere with pacemakers, and
c) 200000 of which type exist worldwide, interfering with pacemakers, and
d) 200,000 of that type exist worldwide and can interfere with pacemakers, and
I picked choice A as it is parallel and with no error compared with other choice.
Please suggest which should be the write answer..
