A.\(3\)
B.\(\sqrt 3 \)
C.\(5\)
D.\(\sqrt 5 \)

A.\(I = 20\)
B.\(I =  - 26\)
C.\(I =  - 22\)
D.\(I = 28\)

A.\(8\sqrt 6 \pi \)
B.\(24\sqrt 6 \pi \)
C.\(10\sqrt 6 \pi \)
D.\(12\sqrt 6 \pi \)

A.\(\dfrac{1}{{2021}}\)
B.\(\dfrac{1}{{2022}}\)
C.\(\dfrac{1}{{1011}}\)
D.\(\dfrac{2}{{2019}}\)

A.\( - \dfrac{1}{6}\)
B.\(\dfrac{3}{4}\)
C.\( - \dfrac{2}{3}\)
D.\(\dfrac{4}{5}\)

A.\(\dfrac{{a\sqrt {30} }}{6}.\)
B.\(\dfrac{{a\sqrt {66} }}{{22}}\)
C.\(\dfrac{{a\sqrt {30} }}{{10}}\)
D.\(\dfrac{{a\sqrt 2 }}{2}\)

A.\(2\)
B.\(3\)
C.\(0\)
D.\(1\)

A.\(\dfrac{1}{{16}}\)
B.\(\dfrac{3}{{64}}\)
C.\(\dfrac{3}{{16}}\)
D.\(\dfrac{1}{{64}}\)

A.\(\dfrac{9}{{\sqrt {173} }}\)
B.\(\dfrac{9}{{\sqrt {154} }}\)
C.\(\dfrac{{18}}{{\sqrt {173} }}\)
D.\(\dfrac{{18}}{{\sqrt {154} }}\)

A.\(1\)
B.\(3\)
C.\(2\)
D.\(4\)