Which of the following was not one of the ideas of Sanskrit literature incorporated

Q. Which of the following was not one of the ideas of Sanskrit literature incorporated into Sangam literature?

(a) Worship of Indra as the principal deity

(b) Arundhati as the ideal of chastity

(c) The concept of three-fold debt (rinatraya) of man

(d) Uttar-Kuru (northern country) as a land of perpetual enjoyment

Ans: (a) Worship of Indra as the principal deity