We know that indus civilization was 1st observed by J FLEET in 1912 in harappan city(Now in Pakistan)well the 2 major cities of this civilization are Harappan & Mohenjo Daro.But 1st seals of indus civilization was 1st observed in harappan city by J FLEET in 1912.Later this issue was again came to show and under the Campaign of Sir John Marshall in 1921this civilization was renamed. Now this was can also be called as harappan civilization.I think it is helpfull. Isn't it?

The Indus Valley Civilization was one of the earliest civilizations in the world, which flourished during the Bronze Age in the northwestern regions of South Asia. The civilization had a distinct culture, which is reflected in its art forms. Let's examine each of the given art forms and identify which ones belong to the Indus Valley Civilization.

1. Mother goddess (terracotta):
The Mother goddess was a popular figure in the ancient Indus Valley Civilization, and terracotta figurines of the goddess have been found at various excavation sites. These figurines depict a seated or standing female figure, often with exaggerated hips and breasts, indicating fertility and motherhood.

2. Unicorn seals:
Unicorn seals are small stone seals, usually made of steatite, that were used for stamping and identifying goods and property in ancient times. These seals have engravings of various animals, including the mythical unicorn, which was a popular motif in the Indus Valley Civilization.

3. Lion capital:
The Lion capital is a sculpture that depicts four lions standing back to back, mounted on an abacus with a frieze carrying sculptures in high relief of an elephant, a galloping horse, a bull, and a lion, separated by intervening spoked chariot-wheel over a bell-shaped lotus. It is believed to have been erected in the third century BCE and is now the national emblem of India. This art form is not from the Indus Valley Civilization but is from the Mauryan period in Indian history, which came much later.

4. Mural painting:
Mural painting is a form of painting that is done directly on walls, ceilings, or other large surfaces. While mural paintings have been found in various parts of India, there is no evidence of mural paintings in the Indus Valley Civilization.

Therefore, based on the above analysis, we can conclude that the art forms from the Indus Valley Civilization are:

- Mother goddess (terracotta)
- Unicorn seals

Hence, the correct answer is option B - 1 and 2 only.