Option a is the correct answer The Harappan seal-tablets depict a number of animals, but eight are most common. Four of these are wild animals of the grasslands: rhinoceros, elephant, buffalo, and tiger. These are in a minority within the entire sample of seal-tablets. The other four animals are domesticates: goat, zebu, shorthorn bullock, and the so-called unicorn bull. Cow, camel, horse and lion were not depicted on seals. Cow's appearance was first noted in Vedic texts.