option C i.e -1.625.
Since exponent is 01111111 hence it is a normalized number. and exponent value is 127 – 127 = 0
Mantisa fraction part is 101 and trailing zeros.
hence it’s value is $2^{-1} + 2^{-3}$ = 0.625
Sign bit is 1 hence the number is negative.
Thus the number is -1.625