[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Exponents ans Indices.
Since we know that, something inverse is a reciprocal.
that, (a) ^-1 = 1/a and (a^m)^n = a^m*n
so applying this we get as,
Option B.
==> 4^15 . 5^10
