Who was the chief calligrapher of the original Indian Constitution, and which animal was adopted as the official seal of the Constituent Assembly?

Explanation

Prem Behari Narain Raizada was the chief calligrapher of the original Constitution, which he handwritten in a flowing italic style. Shanti Niketan artists including Nandalal Bose illuminated and decorated it. Crucially, the Elephant was adopted as the symbol or seal of the Constituent Assembly.