Correct Answer - B
Case (1): All tail `((1)/(2))^(5)`
Case(2): 4T,1H `""^(5)C_(4)((1)/(2))^(4).((1)/(2))^(5)=(5)/(2^(5))`
Case (3): `xxTxxTxxTxx`
`((1)/(2))^(3)xx""^(4)C_(2)xx((1)/(2))^(2)=(1)/(2^(5))xx6=(6)/(2^(5))`
Case (4),`xxTxxTxx`
`((1)/(2))^(2)xx((1)/(3))^(3)=(1)/(2^(5))`
overall `(13)/(2^(5))`