It clearly states 'often EEG indicates but not always'
Also when we say 'is reasonably reliable indicator '
It implies positive reading means there is higher chances of epilepsy
i.e patients with negative reading have lower chances of epilepsy but we cannot completely rule out
D is the best choice
By method of negation
A and E is opposite to what author means to say
B and C are out of scope
So D
Kudos if explanation was helpful
...
Also when we say 'is reasonably reliable indicator '
It implies positive reading means there is higher chances of epilepsy
i.e patients with negative reading have lower chances of epilepsy but we cannot completely rule out
D is the best choice
By method of negation
A and E is opposite to what author means to say
B and C are out of scope
So D
Kudos if explanation was helpful
...






