Which of the following statements are True for the Harappan script?

A. It contains around 400 signs.
B. It was written from right to left.
C. It has been deciphered.
D. It is alphabetical.

Choose the correct answer from the options given below:

A, B only

The correct answer is Option (2) → A, B only

Most inscriptions are short, the longest containing about 26 signs. Although the script remains undeciphered to date, it was evidently not alphabetical (where each sign stands for a vowel or a consonant) as it has just too many signs - somewhere between 375 and 400. It is apparent that the script was written from right to left as some seals show a wider spacing on the right and cramping on the left, as if the engraver began working from the right and then ran out of space.

So, the correct option is [2].