Assertion (A): Earthworms are not good for agriculture. Reason (R): Earthworms break down the soil into fine particles a
Let us keep Assertion-Reason simple. In Soil, the right combination here is (A) is false, but (R) is true. First ask, is Assertion true? Then, is Reason true? Then, does Reason explain Assertion? When you answer those three, you get (A) is false, but (R) is true.
Ref: [Kerala PSC (Pre) 2013] | NCERT Geography textbooks and Goh Cheng Leong, Certificate Physical and Human Geography, discuss Soil and explain the geographical concepts and processes that support the correct answer for this question.