In which year did the Election Commission have to postpone the election process due to the assassination of an ex-Prime Minister Rajiv Gandhi?

1991

The correct answer is Option 2 - 1991

The Election Commission has also faced the difficult situation of having to postpone the election process mid-way in 1991 when the ex-Prime Minister Rajiv Gandhi was assassinated during campaigning.

Since 1951–52, seventeen Lok Sabha elections have been held. Many more State assembly elections and by-elections have been conducted by the Election Commission. The EC has faced many difficult situations such as holding elections in militancy-affected areas like Assam, Punjab or Jammu and Kashmir. It has also faced the difficult situation of having to postpone the election process mid-way in 1991 when the ex-Prime Minister Rajiv Gandhi was assassinated during campaigning. In 2002, the Election Commission faced another critical situation when the Gujarat Assembly was dissolved and elections had to be conducted. But the Election Commission found that unprecedented violence in that State had made it impossible to hold free and fair elections immediately. The Election Commission decided to postpone elections to the State Assembly by a few months. The Supreme Court upheld this decision of the Election Commission.