The first Jain council, known as the First Jain Council of Pataliputra, was held in Pataliputra. This council is believed to have taken place around 300 BCE, shortly after the death of Lord Mahavira, the 24th Tirthankara of Jainism. The purpose of the council was to compile and codify the teachings of Mahavira, ensuring their preservation and transmission. Pataliputra, an ancient city in present-day Bihar, India, was a significant center for intellectual and religious activities during that period.

The correct option is 1 i.e Taj Mahal. Pietra dura, the inlay technique of architecture can be found in Taj Mahal. Pietra dura also called as "parchin kari", is a term for the inlay technique of using cut and fitted, highly polished colored stones to create images.

Answer: A) 1954 Explanation: The Bharat Ratna is the highest civilian award of the Republic of India. Instituted in 1954, the award is conferred "in recognition of exceptional service/performance of the highest order", without distinction of race, occupation, position, or sex.