Q. Monoecious plant of Chara shows occurrence of :

Q. Monoecious plant of Chara shows occurrence of :

1. Upper oogonium and lower antheridium on the same plant
2. Antheridiophore and archegoniophore on the same plant
3. Stamen and carpel on the same plant
4. Upper antheridium and lower oogonium on the same plant