Which one of the following is a xerophytic plant in which the stem is modified into the flat green and succulent structure?

Consider the following four statements (i), (ii), (iii) and (iv) and select the right option for two correct statements.

Statements :
(i)  In vexillary aestivation, the large posterior petal is called-standard, two lateral ones are wings and two small anterior petals are termed keel.
(ii)  The floral formula for Liliaceae is

(iii)  In pea flower the stamens are monadelphous.
(iv)  The floral formula for Solanaceae is


The correct statements are

The correct floral formula of soyabean is

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?