Which one among the following is not a characteristic of Rig-Vedic Aryans

Q. Which one among the following is not a characteristic of Rig-Vedic Aryans?

(a) They were acquainted with horses, chariots and the use of bronze

(b) They were acquainted with the use of iron

(c) They were acquainted with the cow, which formed the most important form of wealth

(d) They were acquainted with the use of copper and the modern ploughshare

Ans: (b) They were acquainted with the use of iron