Which is the best Indica Strain to relax with?
Purple Queen, among others, is a good strain to relax with.
What is the primary effect of the Indica Strain?
It is primarily calming, but each strain also has its own effects.
Which Indica Strain is most popular worldwide?
That would be the Northern Lights strain.
Does an Indica Strain usually have a high THC%?
In general this is true indeed.
Is it true that an Indica Strain is more potent than a Sativa strain?
Not always, but most of the times yes.