Which of the following are nitrogen-fixing plants?1.Alfalfa2.Amarnath3.Chickpea4.Clover5.Purslane (Kulfa)6.SpinachSelect the correct answer using the code given below:

1. A

   1, 3 and 4 only

   1, 3 and 4 only. Alfalfa, chickpea and clover are legumes (nitrogen-fixing). Amaranth, purslane and spinach are not.

2. B

   1, 3, 5 and 6 only

   1, 3, 5 and 6 only. Kulfa and spinach do not fix N2.

3. C

   2, 4, 5 and 6 only

   2, 4, 5 and 6 only. Drops the true legumes.

4. D

   1, 2, 4, 5 and 6

   1, 2, 4, 5 and 6. Amaranth is not a fixer.

Summary. Official key is (a) 1, 3 and 4 only. Alfalfa, chickpea and clover are Fabaceae with Rhizobium. Amaranth, purslane (kulfa) and spinach are leafy non-legumes.