Which of the following statements is/are correct?

1. True arch was an indigenous architectural feature.

2. Burjapatra was palm leaves used for writing books.

3. The knowledge of making domes is not possible without the knowledge of making true arches.

Select the correct answer using the code given below:

• Lime mortar paved way for the construction of true arch (Mihrab). The very arrangement of bricks or stones in making a true arch demands a strong cementing material to hold the voussairs together. Lime mortar fulfilled this need. This thus explains the almost total absence of true arch in Indian buildings prior to the Turkish advent. The only exception, however, was the Kushana period: excavations at Kausambi (near Allahabad) have revealed the existence of some arches over small windows. It will be important to note that the Kushanas too were from Central Asia and, hence, true arches were not indigenous.

• ‘The writing material in ancient India includes: Stones, copper plates, silk and cotton clothes. Talpatra were palm leaves and Burjapatra were birch barks used for writing books.

• It is observed that a dome is a true arch turned 360 degrees. In other words, a dome was constructed on the principle of intersecting true arches. Hence, vaulting or dome was not possible without knowledge of how to make a true arch.