Incorrect Statement 1: All the seals of Harappan Civilization are square.

The first statement is incorrect. While many seals of the Harappan Civilization are indeed square in shape, not all of them follow this pattern. The seals come in various shapes, including rectangular, circular, and other irregular shapes. This diversity in seal shapes suggests that the Harappans had a range of preferences and artistic expressions.

Correct Statement 2: Most seals have inscriptions in an already deciphered pictographic script.

The second statement is also incorrect. The script used in the Harappan Civilization has not been fully deciphered yet. The script found on the seals and other artifacts of the civilization is yet to be completely understood, and several theories and attempts have been made to decipher it. The script is composed of pictographic signs, but the meaning behind these signs and the language they represent have not been fully deciphered. Therefore, it would be inaccurate to claim that the script has been deciphered.

Explanation:

The Harappan Civilization, also known as the Indus Valley Civilization, was one of the most ancient urban civilizations in the world, dating back to around 2500 BCE. It thrived in the Indus River valley, which is now a part of modern-day Pakistan and northwest India. The civilization left behind a wealth of archaeological artifacts, including seals, pottery, figurines, and sculptures.

Seals were an important aspect of the Harappan Civilization and were used for various purposes, such as marking ownership, authentication, or as amulets. The seals were made from materials like steatite, a soft stone that allowed for intricate carving and engraving. Many of these seals featured animals, mythical creatures, and human figures, often depicted in a naturalistic style.

The seals also featured inscriptions in a script that is yet to be deciphered. The script consists of a series of pictographic signs, which are believed to represent words or ideas. However, the exact meaning of these signs and the language they represent remain a mystery. Despite numerous attempts by scholars and researchers, the script has not been fully deciphered, and there is no consensus on the language or languages used by the Harappan people.

In conclusion, the correct answer is option D: None of the above. The first statement is incorrect because not all seals of the Harappan Civilization are square. The second statement is incorrect because the script used in the civilization has not been fully deciphered yet.