Total number of tripeptides possible by mixing of valine and proline is ________ .

Match items of Row I with those of Row II.

Row I:

(P)

(Q)

(R)

(S)

Row II:

(i) $\mathrm{\alpha }‐\mathrm{D}‐(—)$ Fructofuranose.

(ii) $\mathrm{\beta }‐\mathrm{D}‐(—)$ Fructofuranose.

(iii) $\mathrm{\alpha }‐\mathrm{D}‐(‐)$ Glucopyranose.

(iv) $\mathrm{\beta }‐\mathrm{D}‐(‐)$ Glucopyranose.

Correct match is

Following tetrapeptide can be represented as

($\mathrm{F},\mathrm{L},\mathrm{D},\mathrm{Y},\mathrm{I},\mathrm{Q},\mathrm{P}$ are one letter codes for amino acids)

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Ketoses give Seliwanoff’s test faster than Aldoses.

Reason (R): Ketoses undergo $\beta$-elimination followed by formation of furfural.

In the light of the above statements, choose the correct answer from the options given below:

The correct representation in six membered pyranose form for the following sugar [$\mathrm{X}$] is