Which of the following statements about the Harappan script is not correct?
1
The number of signs of the Harappan script is known to be between 400 and 600, of which about 40 or 60 are basic and the rest are their variants.
2
The variants are formed by adding different accents, inflexions or other letters to the former.
3
S R Rao has claimed to have deciphered Harappan script which is accepted by majority of the historians.
4
Harappan script is regarded as pictographic since its signs generally represent birds, fish, varieties of the human form, etc.