Explanation:

To solve the problem, let's break it down step by step:

- The ratios given are:

- A : B = 3 : 4

- B : C = 8 : 5

- C : D = 7 : 10

- We need to make these ratios consistent across A, B, C, and D by expressing them with a common factor. First, combine these ratios:

- A : B : C = 3x : 4x : (5/8) × 4x = 15x/2

- Considering C : D = 7 : 10, express C and D in terms of a single variable.

- Hence, B : C : D = 8y : 5y : (10/7) × 5y = 50y/7

- Set 4x = 8y and solve for variable equality:

- x = 2y, which gives us overall ratios for A, B, C, and D.

- Calculate shares:

- A = 3x = 6y, B = 4x = 8y, C = 5y and D = (50/7)y.

By summing these parts and making them equal to 8235, solve for y and find each one's share, specifically A and C. The calculations show the difference is Rs315.

Therefore, the correct answer is:

Option:4 - Rs315

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