A.1/8

B.1/2.

C.1/4

D.1/16.

$\mathrm{A}. {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{A}}, {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}$

$\mathrm{B}. {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}$

$\mathrm{C}. {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{A}}, {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}$

$\mathrm{D}. {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{A}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}$

A. X^AY, X^aX^a, X^AY, X^AX^a, X^aY.

B. X^AY, X^aX^a, X^AX^a, X^AY, X^AX^A, X^aY.

C. X^AY, X^aX^a, X^AX^a, X^AY, X^AX^a, X^aX^a.

D. X^AY, X^aX^a, X^AX^a, X^AY, X^AX^a, X^aY.

$\mathrm{A}. {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{A}}, {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}$

$\mathrm{B}. {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}$

$\mathrm{C}. {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{A}}, {\mathrm{X}}^{\mathrm{a}}\mathrm{Y}$

$\mathrm{D}. {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{a}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{a}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}, {\mathrm{X}}^{\mathrm{A}}{\mathrm{X}}^{\mathrm{A}}, {\mathrm{X}}^{\mathrm{A}}\mathrm{Y}$ 

A. X^AY, X^aX^a, X^AY, X^AX^a, X^aY

B. X^AY, X^aX^a, X^AX^a, X^AY, X^AX^A, X^aY

C. X^AY, X^aX^a, X^AX^a, X^AY, X^AX^a, X^aX^a

D. X^AY, X^aX^a, X^AX^a, X^AY, X^AX^a, X^aY

A. 50%.

B. 100%.

C. 25%.

D. 75%.

A. 50%.

B. 100%.

C. 25%.

D. 75%.