In which solvent is beeswax completely soluble?

Assertion: Vegetable oils are fats which are present in plant cells in soluble form.
Reason: Vegetable oils occur only in cells of embryo.

Consider the following four statements $(a-d)$ and select the option which includes all the correct ones only $:-$
$(a)$ Lipids are generally water insoluble.
$(b)$ The $R$ group could be a methyl $(-CH_3)$ or ethyl $(-C_2H_5)$ or higher number of $-CH_2$ groups ($1$ carbon to $19$ carbons) in fatty acids.
$(c)$ Palmitic acid has $16$ carbons including the carboxyl carbon.
$(d)$ Arachidonic acid has $21$ carbon atoms including the carboxyl carbon.

Sterone and sterol are distinguished based on the presence or absence of which group?

Cerebrosides are . . . . . . .

Vitamin $E$ helps in