With reference to 'earthworms', which of the following statements is/are correct?1.Earthworms improves soil fertility and are known as farmer's friends.2.Earthworm has two pair of hearts.Select the correct answer from the code given below:

1. A

   Only 2

   Only 2. Earthworms have many pairs of aortic arches (often five), not two.

2. B

   Neither 1 nor 2

   Neither. Statement 1 holds: they are farmer’s friends.

3. C

   Both 1 and 2

   Both. Statement 2 is the false anatomy.

4. D

   Only 1

   Only 1. They improve fertility. Two pairs of hearts is wrong.

Summary. Official key is (d) only 1. Farmer’s friends; not two pairs of hearts. Also note: Aortic arches — Typically five pairs in Pheretima; Castings — Raise NPK and aeration; Vermicompost — Eisenia fetida; Skin respiration — Sister fact, Q98.