Which one of the following relations is not correct?

A. $$f\left( t \right)\delta \left( t \right) = f\left( 0 \right)\delta \left( t \right)$$

B. $$\int_{ - \infty }^\infty {f\left( t \right)\delta \left( \tau \right)d\tau = 1} $$

C. $$\int_{ - \infty }^\infty {\delta \left( \tau \right)d\left( \tau \right) = 1} $$

D. $$f\left( t \right)\delta \left( {t - \tau } \right) = f\left( \tau \right)\delta \left( {t - \tau } \right)$$

Answer: Option B