Which of the following statements about sexual reproduction in flowering plants are correct ?
1. Stament is present in the centre of a flower.
2. Stament produces pollen grains in the ovary
3. The swollen bottom part of carpel is the ovary
4. The fusion of germ cells gives rise to zygote
Select the correct answer using the code given below :
(a) 2, 3 and 4 only (b) 2 and 4 only (c) 1 and 3 only (d) 1, 2, 3 and 4