01. What are the categories of devotional service which Srila Rupa Gosvami describes in NOD?

a)   Devotional service in practice, Devotional service in ecstasy, Devotional service in quality
b)   Devotional service in practice, Devotional service in humility, Devotional service in pure love of Godhead
c)   Devotional service in practice, Devotional service in ecstasy, Devotional service in pure love of Godhead
d)   Devotional service in practice, Devotional service in knowledge, Devotional service in humility

The correct answer is
c)    Devotional service in practice, Devotional service in ecstasy, Devotional service in pure love of Godhead