Starch grains in latex are

$S:$ Lemon is an example of Disciflorae.
$R:$ In lemon,the thalamus is cup-shaped.

According to the classification system of Bentham and Hooker,what is the total number of families of seed-bearing plants (Phanerogams)?

Raphides are needle-like crystals of calcium oxalate which are specially found in

Differentiate between Dicotyledons and Monocotyledons.

Given below are two statements $:$
Statement $- I :$ The arrangement of ovules within the ovary is known as aestivation.
Statement $- II :$ The mode of arrangement of sepals and petals in floral bud with respect to the other members of the same whorl is known as placentation.
In the light of the above statements,choose the correct answer from the options given below $:$