Which of the following was not true in respect of the economy of the Vedic period?

Wells and canals were used for irrigation.

Besides agriculture and animal husbandry they did not practice any specialized occupations.

Wheat, rice and barley were mainly grown. Cotton was also cultivated.

Cows were their principle wealth, horses were also important because of their utility during wars.

The metal workers made armor and helmets for warriors besides making weapons, tools and utensils.