Which one of the following is the structure of lactose?

The two forms of $D$-Glucopyranose are called

Which of the following is an incorrect match?

Which of the following statements is not true for glucose?

Which of the following pentoses will be optically active?
$I$: $CHO-CH(OH)-CH(OH)-CH(OH)-CH_2OH$
$II$: $CHO-CH(OH)-CH(OH)-CH(OH)-CH_2OH$
$III$: $CHO-CH(OH)-CH(OH)-CH(OH)-CH_2OH$

On heating glucose with Fehling's solution,we get a precipitate whose colour is