The correct answer is option 2: Parliament.

The conditions of service and tenure of the Election Commissioner in India are prescribed by the Parliament. This means that the laws and regulations regarding the appointment, term, and other aspects of the Election Commissioner`s service are determined by the legislative body of the country.

The Election Commissioner is an important position tasked with overseeing and conducting free and fair elections in India. They play a crucial role in ensuring the democratic process is upheld and that elections are conducted in a transparent and unbiased manner.

It is the responsibility of the Parliament to establish and enforce the rules and regulations governing the Election Commissioner`s appointment and service. By giving this authority to Parliament, it ensures that the process of appointing and maintaining the Election Commissioner`s tenure is carried out through a democratic and accountable mechanism.

Alert - correct answer should be option 1: Constitution. The conditions of service and tenure of the Election Commissioner in India are prescribed by the Constitution. The Constitution of India, under Article 324, provides for the appointment and functions of the Election Commission. It sets out the tenure, powers, and conditions of service of the Election Commissioner. This is done to ensure the independence and impartiality of the Election Commission and to safeguard the democratic process in the country.