Explanation:

- The proposed plan expenditure on electricity in Rajasthan's budget 2021-22 is a specific part of the total budget.

- Option 1 (52.19%) suggests more than half of the total expenditure is going to electricity, which is quite high.

- Option 2 (14.32%) and Option 4 (12.05%) suggest around one-eighth of the budget is for electricity.

- Option 3 (7.42%) suggests an even lower allocation.

- According to official budget documents and government data for Rajasthan 2021-22, the planned allocation for electricity was 14.32% of the total expenditure.

Option:2, 14.32% is correct.