Explanation:

- Total votes cast are 90% of the electoral roll.

- Invalid votes are 15% of the votes cast.

- Valid votes are 85% of votes cast (since 100% - 15% = 85%).

- Jeeta secured 60% of the valid votes, which equals 91,800.

Now, let's calculate the total electoral roll:

- Let the total number of people on the electoral roll be X.

- Votes cast = 90% of X = 0.9X

- Valid votes = 85% of votes cast = 0.85 * 0.9X = 0.765X

- Jeeta's votes = 60% of valid votes = 0.6 * 0.765X = 91,800

Now solve for X:

- 0.6 * 0.765X = 91,800

- 0.459X = 91,800

- X = 91,800 / 0.459

- X = 2,00,000

Therefore, the total number of people on the electoral roll is 2,00,000.

- Option: 1, 2,16,000

- Option: 2, 2,25,ooo

- Option: 3, 1,80,000

- Option: 4, 2,00,000