Which of the following interchanges in signs and numbers will make the given equation correct?
$$7\times 9+5=68$$

Let's check Option D: Interchange $\times$ and $+$, and numbers $7$ and $9$.Original Expression: $7\times 9+5=68$ New Expression: $9+7\times 5=68$ Applying BODMAS:Multiplication: $7\times 5=35$ Addition: $9+35=44\ne 68$ (Option D is incorrect)Let's test Option C: Interchange $\times$ and $+$, and numbers $5$ and $7$.New Expression: $5+9\times 7=68$ Applying BODMAS:Multiplication: $9\times 7=63$ Addition: $5+63=68$ Since $68=68$, Option C makes the equation correct.