Which of the following grains is rarely found from Harappan Sites?

Rice

The Mature Harappan culture developed in areas previously occupied by the Early Harappan cultures.
The Early Harappan and Mature Harappan cultures shared certain common elements, including subsistence strategies.
The Harappans had a diverse diet, including a wide range of plants, animal and fish products.
Archaeo-botanists study charred grains and seeds to reconstruct dietary practices.
Grains such as wheat, barley, lentil, chickpea, and sesame were found at Harappan sites, while millets were found in Gujarat.
Rice finds at Harappan sites are relatively rare.