To find the Range, we need to find all possible values of 'y' such that x is a natural number (N = {1, 2, 3, ...}). From x + 2y = 10, we get x = 10 - 2y. Since x must be a natural number, 10 - 2y > 0, which implies 2y < 10 or y < 5. Also, since y must be a natural number, the possible values for y are {1, 2, 3, 4}. Let's check x for these values: If y=1, x=8 (∈ N); If y=2, x=6 (∈ N); If y=3, x=4 (∈ N); If y=4, x=2 (∈ N). If y=5, x=0 (not a natural number). Thus, the relation R = {(8,1), (6,2), (4,3), (2,4)}. The Range is the set of second elements: {1, 2, 3, 4}. Option A is the Domain of the relation. Option B includes 5, which results in x=0 (not in N). Option D is missing the value 1.