Which of the following is water soluble?

Which of the following has largest size?

Which of the following contain $\alpha$-$D$-glucose units?
$a$) Cane sugar
$b$) Milk sugar
$c$) Cellulose
$d$) Amylose

Which of the following represents a nucleoside?

Assertion : $Mg$ is not present in the enamel of human teeth.
Reason : $Mg$ is an essential element for the biological functions of humans.

Which among the following statements about terpenes is $NOT$ true?