The correct option is
A A- 4, B- 5, C- 1, D- 2 Nerium indicum, also known as
Neriium oleander is a small tree of the family Apocynaceae.
Cassia fistula is the golden shower tree of the family Fabaceae and subfamily Caesalpiniaceae.
Corypha umbraculifera, the talipot palm is one of the largest palms in the world and belongs to the family Arecaceae.
Nicotiana tabacum the cultivated tobacco is a herbaceous plant from the family Solanaceae. Thus, the correct answer is option A.