With reference to 'earthworms', which of the following statements is/are correct? 1. Earthworms improve soil fertility and are known as farmers' friends. 2. Earthworm has two pairs of hearts. Select the correct answer using the code given below.

उत्तर देखें और व्याख्या

उत्तर: (B) Only 1

व्याख्या

Earthworms aerate and enrich soil (farmer's friend), but they have four pairs of lateral hearts, not two.