Explanation:

- Yash spends 25% of his salary on EMI.

- After paying EMI, 75% of his salary is left.

- From the remaining salary, he spends:

- 30% on rent.

- 10% on food.

- 45% on groceries.

- 15% on video blogging.

- The problem states the difference between EMI spending and food is Rs. 945.

Let's find the salary:

- Let the monthly salary be Rs. x.

- EMI = 25% of x = 0.25x.

- Food = 10% of remaining 75% of x = 0.10 * 0.75x = 0.075x.

- Difference = EMI - Food = 0.25x - 0.075x = Rs. 945.

- So, 0.175x = Rs. 945.

- Solving for x, x = Rs. 5400.

- Option:3 - Rs. 5400 is correct.