Millets are a group of small seeded plants which are grown as cereal crops. They are getting more importance in the agricultural system because of their tolerance to high temperature and droughts. So, statement A is incorrect.
Millets require less water compared to crops such as rice and wheat. So, statements B is correct.
If stored properly, millets have a storage life of 1-2 years which is much longer than other crops such as rice and maize. So, statement C is correct.
Millets are a rice source of nutrients such as protein, fats, etc. So, statement D is correct.