The correct answer is (A):a1 = 1/2(5) = 1/3(1/2-1/5)a2 = 1/5(8) = 1/3(1/5-1/8)----a100 = 1/299(302) = 1/3(1/299-1/302)All the terms like 1/5, 1/8,……..1/299 will cancel out.∴ The sum = 1/3(1/2-1/302)= 1/3(300)/(2)(302) = 50/302 = 25/151